Short answer: A grasscutter colony succeeds or fails on its records, not on the animals alone. Keep a breeding register from the first day, judge each doe by the young she weans in a year, and rotate bucks before inbreeding shows up in the litters. Grow the colony in stages, and only after a full year of clean records.
Key takeaways
- Open a breeding register on day one. Record the parents, mating dates, births, weaning and deaths for every animal.
- Judge a doe by the young she weans in a year, not by one large litter.
- Keep a note of where each buck came from, and bring in new blood before the colony closes in on itself.
- Set your culling rules in advance and write each culling decision in the register with its reason.
- Expand only after one full year of clean records and a steady weaning rate.
A colony is a system, so manage it like one
A breeding colony is not a pile of animals in a pen. It is a small production system with inputs such as feed, water and labour, outputs such as weaned young, culled adults and sold stock, and a feedback loop that tells you whether it is working. Most colonies that fail do not fail on a single bad day. They drift for a year because the owner watches the animals and never reads the numbers.
Keepers in Ghana often start with a buck and two or three does bought from a neighbour. Within a year the question changes from 'how do I keep them alive?' to 'which of them should stay?'. That second question is the one this article is about. The answer depends on records you can trust, a routine for reading them, and the discipline to act on what they say even when a favourite animal is involved.
Our business is the birds we hatch, not grasscutters. We have watched plenty of poultry farms run into the same problem with a flock, though. The farms that last are the ones that keep the numbers. The same habit does more for a grasscutter colony than any single feed or pen design.
The breeding register that tells you more than memory
Your memory is good for the animal you handled yesterday and poor for the litter from six months ago. A breeding register removes that guesswork. It can be a hardbound notebook kept in the store, or a printed sheet pinned to the board by the pen door. Use the same format for every animal, and fill it in as things happen.
| Record | Why you keep it | When to write it |
|---|---|---|
| Animal ID and sex | Knowing who is who | On arrival or at birth |
| Sire and dam | Avoiding close matings | At birth |
| Mating date and buck used | Working out the due date and the buck's workload | Each mating |
| Birth date and litter size | Judging each doe's litter performance | Each birth |
| Deaths at birth or before weaning | Finding the weak link early | As it happens |
| Weaning date and weight | Measuring growth and survival | At weaning |
| Body condition | Spotting problems before they show | Every two weeks |
| Feed in and feed left | Measuring waste | Weekly |
The columns look like a lot until you have used them for a season. After that, the register answers questions in seconds: which doe weaned the most young last year, which buck has produced the weakest litters, and which pen has had the most deaths. Without it, those questions get answered by whoever shouts the loudest on the day. The layout of a flock register in our poultry record keeping guide works the same way, and the two books sit well side by side.
Marking animals without stressing them
Grasscutters are hard to tell apart when they are young, and a register is useless if you cannot match a record to an animal in the pen. You need a mark you can read from the pen door. Options include a numbered tag, a tattoo applied by someone who has done it before, or a removable non-toxic paint mark on the fur of the back. Choose the method that your vet or extension officer recommends for your area, and keep the marking quick, clean and gentle.
Handle a doe in late pregnancy as little as you can. A frightened animal in the final weeks is more likely to lose a litter, so mark and weigh her before the pregnancy shows and then leave her alone. Check every mark within a week for swelling, bleeding or infection. A mark that has gone wrong is a welfare problem and a record problem at the same time.
Buck rest, rotation and the buck you keep
A buck is the most expensive animal in the colony, and the one most often overworked. How many does a buck can serve depends on his age, his condition and whether he is also running with young animals or sharing a pen with a rival. The register is the only honest way to tell. Record each mating, the buck used and the result, and read the figures at the end of each cycle.
Watch the buck for loss of weight, reduced interest and a dull coat. Any of those is a reason to rest him. Agree a rest period with your extension officer, based on your own records rather than a figure lifted from someone else's yard. When you return him to the does, check whether the litters improve. If they do not, the problem may be the buck, the does or the feed, and the register will help you work out which.
Keep a second buck in reserve if you can. Two bucks from different sources give you a rest rotation, a backup if one falls ill, and a way to bring in fresh genetics without buying a new line each time.
Inbreeding, the slow problem in a small colony
A closed colony of six or eight animals drifts toward inbreeding within a few generations if you keep mating the same animals together. The early signs are easy to mistake for bad luck: smaller litters, weaker young, more deaths around weaning, and animals with poor feet or a nervous temperament. By the time the pattern is obvious, the damage is already in the colony.
Prevent it with the register. Do not mate a doe with her sire, and do not mate full brothers and sisters. Note where each buck came from, and when you buy a new one, record his source and the date he joined. If you cannot trace an animal's origin, treat it as unrelated to your current stock for the first generation and watch the litters closely. Bringing in a buck from a different line every so often is cheaper than a colony that cannot breed.
When you see a sudden fall in litter size across the whole colony, do not assume the animals have caught a cold. Check the register first. Who was mated to whom, and how often, over the last two years?
Counting what matters: young weaned per doe per year
A litter count on its own tells you very little. A doe that has three litters of two young, all weaned, can outperform one that has two litters of five and loses half of them. The figure that matters is the number of young weaned per doe per year. Add up every young animal weaned in a year and divide by the number of does you kept that year.
Here is a worked example with the assumptions stated. Suppose four does produced twenty weaned young across a year. That is five weaned young per doe per year. If the next year you produce the same twenty weaned young from six does, the figure falls to about three and a third, and you have a problem to find, even though the total output has not moved. Your extension officer can help you set a realistic target for your area, and the target will change as your feed and your management improve.
Calculate the figure at the end of every year and set it against the year before. Keep the calculation in the front of the register, so it is the first thing you read when you open the book.
Culling and replacing: who stays in the colony
Culling is the decision most keepers put off, and it is the one that most improves a colony when it is made on time. Set the rules before you need them, and write each decision in the register with its date and reason. A rule written in calm weather is much easier to keep when the animal in question is your best-looking one.
Typical reasons for culling include a doe that fails to conceive across two mating cycles, one that loses litters repeatedly despite good feed, one with a temperament that injures the others, a buck with poor fertility or poor feet, and an animal with a chronic health problem that has not responded to treatment. Each reason should be checked against the register, not against your impression of the animal. A calm doe that has weaned three good litters in a row is worth more than a flighty one with a pretty coat.
Replacements should come from your best weaners, not from the sickest ones or the easiest to catch. Keep the best young animals, sell the rest, and keep a clear note of which pens produced them so the next generation can be traced.
Splitting the colony into pens with a purpose
A colony works best when each pen has one job. Breeding pens hold the does and the buck. A nursery area holds litters until weaning. A grow-out pen takes the weaners. A sick pen sits apart from everything else, and a store keeps the feed clean. Draw the layout on a sheet of paper, label every pen with a number, and keep the sheet in the register.
The map earns its keep on a busy weaning day, when someone asks which pen holds the litter from the doe with the torn ear and nobody can answer without walking the whole yard. It also makes it easy to move animals without losing track of them. Update the map when a pen changes use, and date the change.
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Quarantine for newcomers and the sick pen
Every new animal goes into a separate pen before it meets the colony. Your vet or extension officer should agree the length of that quarantine for your region and your disease risks. Many livestock units use a few weeks as a minimum, and that is a sensible starting point to discuss, not a rule to copy blindly.
During quarantine, feed and water the newcomers last on each round, so that anything they carry does not travel to the colony on your hands or your boots. Check them every day and write what you see. Wash the tools you used in the quarantine pen before they go anywhere else. The same discipline applies to the sick pen. An animal that is unwell should be moved there early, not left in the breeding pen to see whether it recovers.
Growing from one colony to three, step by step
The most common expansion mistake is building five pens before the first colony has proved itself. Grow in stages, and let the register decide when each stage starts. The table below sets out a sensible pattern. The thresholds are for your own records to meet, not targets we can promise from outside your farm.
| Stage | Breeding stock | What to have ready | Move on when |
|---|---|---|---|
| One colony | One buck and a small group of does | Register, quarantine pen and feed store | A full year of clean records and a weaning figure you trust |
| Two colonies | A second buck from a different source | Separate pens, a second feed bin and a clear pen map | Litters steady for a full breeding cycle |
| Three or more units | Stock bred from your best weaners | Separate water, a labour plan and a culling calendar | Survival to weaning holds for two seasons |
Do not expand in a bad litter season, because the problem you are hiding will grow with the new pens. Build each new colony from your best weaners, and keep the first colony as the source of replacement. Stock improves over generations when you select on the register. It drifts when you buy in and sell out without looking at the numbers.
Selling breeding stock and the paperwork that comes with it
Breeding stock is sold on reputation and paperwork. Describe what you actually have: the animal's age, its weight, its record and, where you know them, the lines its parents came from. Do not claim a pedigree you cannot show. A buyer who asks for a written record is a sign of a serious market, so keep copies of the register entries you hand over.
Check with the Wildlife Division of the Forestry Commission about the licence or permit that applies to keeping and moving grasscutters in your area. Check current terms, because the rules can change, and do not assume that a neighbour's arrangement covers your own sale. Keep the paperwork for every animal you sell, and keep a note of the buyer's contact so that you can answer questions later about the stock. Do not quote prices from this article. Check the current rates in your own market before you set a figure.
Checklist for the quarterly colony review
Set aside an afternoon every three months to read the register from start to finish. It takes less time than a single bad litter, and it is the only way to see the trend. Work through this list in order.
- Count the animals in each pen and check the count against the register.
- Recalculate young weaned per doe for the year so far, and note the change.
- List every mating in the quarter and check that no close pairings slipped through.
- Look at the buck's weight and condition, and decide whether he needs a rest.
- List the deaths, the causes you know and the ones you suspect, and check them against your pen map.
- Apply your culling rules and write each decision with its reason.
- Check the quarantine and sick pens, and the cleaning schedule for both.
- Update the pen map and the feed records, and book a visit from your extension officer if the figures have moved the wrong way.
For the feeding side of the same colony, read our guide on feeding grasscutters in Ghana, and the wider starting notes in the grasscutter starter guide. If your farm also needs birds, day-old chicks are supplied from our hatchery, and orders go through our order form. For wider partnership questions, see partner with us, or send a WhatsApp to +233 24 915 1503 with your question.
Questions farmers ask
How many grasscutters do I need to start a breeding colony?
Start small enough that you can record and feed every animal every day. Many keepers begin with one buck and a few does, because a small colony is easier to keep healthy and to read. Choose your starting size by the pens and labour you actually have, not by the number you hope to sell. Ask your agric extension officer for a sensible starting point in your area, and expand only once your records show the first colony is doing its job.
How do I know if my colony is doing well?
Calculate the number of young weaned per doe per year. Add up every young animal weaned in the year and divide by the number of does you kept. Compare that figure with the year before, and look at deaths before weaning as a second check. A steady or rising figure with low losses means the colony is working. A falling figure is the signal to review feed, pens, buck rest and the culling list.
How do I tell a buck from a doe?
Sexing grasscutters takes practice, and the safest route is to learn from an experienced keeper or your vet, rather than by repeated handling of young animals. Record the sex of each animal at the first check and do not change it later without a note. If you are unsure, mark the animal as unknown in the register and check again when it is older, so a wrong entry does not spoil a whole season of mating records.
What causes a doe to lose her litter?
Causes include disturbance and rough handling near birth, poor nutrition, disease, and predators or rats getting into the pen. Repeated losses from the same doe are a reason to call your vet, because a single cause is usually easier to find than several. Log each loss, its date and the signs you noticed, so the pattern shows up in the register rather than in your memory.
How often should I change the buck?
There is no fixed interval that suits every colony. Change or rest the buck when the register shows falling litters, when he loses condition, or when you need to avoid close matings. Keeping a second buck from a different source makes this easier. Agree the plan with your extension officer, and write the change in the register with the date and the reason.
Can I sell breeding stock without a permit?
Do not assume you can. Check with the Wildlife Division of the Forestry Commission about the licence or permit that applies to keeping and moving grasscutters in your area, and check current terms, since rules can change. Keep the paperwork for every sale, and keep a copy of the register entry for each animal you hand over.
How do I stop inbreeding in a small colony?
Use the register to avoid mating an animal with its sire, its dam or its full siblings. Note where each buck came from, and bring in a new buck from a different source when the colony is closing in on itself. If you cannot trace an animal's origin, treat it as unrelated for the first generation and watch the litters. Inbreeding is slow, so the early warnings are small changes in litter size and weaning survival.
Should I keep grasscutters and poultry on the same farm?
Many farms do, provided the pens, tools and feed are kept apart. Use one-way traffic for people and equipment, keep wild birds out of stored feed in both areas, and remove dead birds promptly. Our poultry biosecurity guide sets out the checklist for the bird side. If you are restocking birds, our day-old chicks are supplied from the hatchery, and the breed guide explains which bird suits which purpose.
