Snail Breeding and Egg Handling in Ghana

Why the breeding pen decides the next year

The breeding pen is the one place where a mistake costs you the most. A grow-out pen that goes wrong loses the animals in it. A breeding pen that goes wrong can cost you the eggs of a whole season, and the stock you would have sold next year. Treat the breeding pen as the most valuable part of the farm, and run it with the care you would give a valuable hen house.

This guide assumes you already have the pens built and your breeders bought, with some confidence in where they came from. Buying and building are covered elsewhere on this site, so here the focus is on what happens after the breeders go in: pairing, mating, laying, egg care, hatching and keeping the line strong.

Pairing and grouping the breeders

Giant land snails carry both sexes in one body, but two adults still need to exchange sperm before either can lay fertile eggs. A small group gives you more pairing options than a single pair, and a group of two or three adults in one breeding pen is a manageable size for most keepers. Put any more than that in one pen and the pen becomes hard to watch, the feed runs short for the quieter animals and the disturbance keeps the others from settling.

Label every breeder with a number, a tag or a painted mark that survives damp conditions. Keep the number in the breeding book next to the date you acquired the animal, its source and its approximate age. Without these records, you cannot tell later which adult produced which clutch, and that is the information you need to avoid breeding the same animals together year after year.

Recognising mating, and the gap before eggs

Mating in snails is quiet, and you can miss it entirely. Look for animals that stay close together for long periods, sit side by side on the substrate or wedge themselves against each other in the evening. Do not pick them apart to look. Write the date and the time of any sighting in the book, and if you see the same pair several times over a week, put a note against them. Breeders also need more calcium and protein than the young, so check the routine in our feeding snails guide before the breeding season starts.

Eggs do not follow mating straight away. The gap between the two depends on the animals, their condition and the weather, and it can run to several weeks. Do not assume a fault if eggs do not appear within the first fortnight. Keep the dated sightings in your book, and compare them with the eggs you find, so that over a year you learn the real gap for your own stock.

Signs that a clutch is on its way

A snail that is ready to lay tends to spend more time in the moist soil, and it digs at the substrate with its foot in a way that disturbs the surface. You may see a fresh hollow, a patch of soil that has been turned over, or a snail that stays buried for longer than usual. Check the pen at dusk, when the animals are most active, and keep the light low so you do not startle them.

When you find a clutch, note the date, the pen and the number of eggs. Leave the clutch where it is for the moment, and check the soil moisture before you decide whether the eggs need protecting. If the spot is flooding, drying out or exposed to ants, the eggs need moving. If the clutch sits in a dry, sheltered corner of the substrate, leave them until you have made the move safely.

An egg tray that keeps the clutch safe

An egg tray is a shallow, covered box that holds fine, damp soil or sand for the eggs to sit in. Build it from a plastic tray or a timber box with a lid that keeps out ants and rats. Fill it with a few centimetres of a fine mix of soil and clean sand, moist enough to hold a shape when squeezed but never dripping. A coarse or stony mix damages the eggs, and a soil that dries into a crust leaves them exposed.

Keep the tray in a shaded corner of the breeding pen or on a shelf near it. Check the moisture each morning and lightly mist the surface when it looks dry. Drain the tray if water collects, because a clutch that sits in standing water will rot faster than one left to dry out a little.

Collecting and handling eggs gently

Eggs are soft when they are first laid and they hardly tolerate rough handling. Lift them with a spoon or a small scoop, not your fingers, and move them in a small container lined with damp tissue or a little of the same soil. Do not wash them. Washing removes the protective layer that helps keep moisture and microbes in balance, and a wet egg in a dry box is a dead egg. Avoid turning the eggs over, and keep each clutch in the orientation it was found in as far as you can.

Count the eggs as you collect them, record the clutch date and the pen, and return the clutch to the egg tray within the hour. Do not leave eggs in a hot car, on a windowsill or in a bucket of water while you do other jobs. Heat, drying and sudden wetting all kill eggs faster than anything else in the routine.

Poultry keepers will know the habit of egg turning from incubators, and the rule does not carry over. Snail eggs are not turned in the way hen eggs are. If you are also running a poultry incubator, our guide to egg turning during incubation covers the hen-egg rules, and it is worth keeping the two records apart in your notebook.

Incubating in the pen or in a separate tray

Once the eggs are laid, you can leave them in the breeding pen or move them into a separate tray. Each option has trade-offs, and most keepers use the pen for their first clutches and the tray once they have some experience.

Hatching can be spread over several days, so do not disturb the tray once the first hatchlings have emerged. Keep the tray out of direct sun, and make sure heavy rain cannot run into it. The incubation period is commonly described as a few weeks in warm weather, but it shortens or lengthens with the temperature, so use your own dated record rather than a fixed count. If you later add a poultry incubator, the beginners guide to egg incubators explains machine settings that do not apply to snail eggs at all.

Ants are the most persistent threat to a clutch. Keep the tray standing in a moat of water or on legs with water in the cups, and check the moat every few days so that it does not become a mosquito breeding site.

Hatchlings and their first weeks

A hatchling is a tiny version of its parent, with a thin, soft shell and very little reserve. It needs a damp surface, very fine food and a quiet place. Move the hatchlings into their own tray once most of the clutch has emerged, and keep the tray covered with a fine mesh to keep ants out and the young in.

Feed the hatchlings soft greens chopped very finely, and offer a dish of fine calcium powder that they can reach easily. Remove uneaten greens each morning, because mould spreads fast on small surfaces. Keep the tray moist without standing water, and check it at dusk, when the young are most active. A tray that smells sour is a tray that needs its substrate changed that day.

1. Count the hatchlings once they have settled, and write the number in the book.
2. Check the moisture and the feed each morning and evening.
3. Remove dead hatchlings immediately, and note the number lost.
4. Move the young to a grow-out pen only after they are large enough to handle without damage.

Keeping the line healthy through rotation

A line of snails can slowly weaken if the same adults keep mating with their own offspring. Growth becomes slower, hatch rates fall and the animals become more vulnerable to the pen problems that a stronger line would shrug off. The remedy is simple in principle: rotate breeders, keep records of parentage where you can, and bring in new adults from a different source when your numbers begin to decline.

If you are still deciding whether snails belong on your farm at all, our snail farming guide is the place to start. Do not wait for a crisis. Each season, decide which breeders stay, which are moved to a different breeding pen, and which are retired from breeding and sold on for meat. Keep the oldest or least productive adults out of the breeding pen, and let the young from your best clutches take their place. Your buyer book and your clutch record will tell you which animals are worth keeping.

• Keep parentage notes wherever the pens allow it, so you can see which adult produced each clutch.
• Move breeders between pens at least once a year to vary who is paired with whom.
• Retire old or weak adults from breeding and remove them before they stop eating.
• When the hatch rate falls for two seasons running, bring in new breeders before you change anything else.

Counting, recording and working out your hatch rate

Hatch rate is simple to define and easy to get wrong. It is the number of hatchlings alive at a fixed point after hatching, divided by the number of eggs you counted when the clutch was laid. Choose the fixed point before you start, such as the moment the hatchlings are moved to their own tray, and use the same point every season. If you count the hatchlings at different times, you will compare apples with oranges.

Losses happen at several points, and each one tells you something different. Eggs that never hatch point to moisture, handling or pests in the tray. Hatchlings that die in the first week point to heat, desiccation or the wrong food. The table below uses an invented clutch to show the working; replace the figures with your own counts.

In this example the hatch rate at the fixed point is 30 out of 40, or 75 per cent. Use the same working for every clutch and watch the trend. A single clutch can mislead you, but a year of clutches shows whether the pen is getting better or worse.

When to pause breeding

Breeding follows the weather, and it is a mistake to push a pen through a season that does not suit it. The harmattan dries the soil and the air, and animals seal their shells and stop active behaviour for much of it. Eggs laid in those conditions are the ones most likely to desiccate. In the main rains, the risk moves to flooding and mould, which can wipe out a clutch in a single heavy night.

Many keepers pause breeding during the harmattan and focus on feeding and growing out their stock. They then plan the next clutches for the early rains, when the soil is recovering and the greens are returning. Use your records from the previous year to decide the timing for your own district, and ask the agric extension office whether the pattern in your area differs from what you expect.

Checklist for the breeding pen

• The breeding pen is separate from the grow-out pens, quiet, shaded and drained.
• Every breeder carries a number, and each number appears in the breeding book.
• Mating sightings and laying dates are written down with the date and the pen.
• The egg tray has a lid, a fine damp mix, and a moat or legs against ants.
• Eggs are moved with a spoon, and are never washed or turned.
• Hatchlings are counted at a fixed point, and losses are noted with a cause.
• A rotation plan for breeders is written for the season ahead.

A snail breeding unit runs on the same record discipline as a poultry breeder flock. If you are building that discipline, our poultry record keeping guide sets out the habits that carry across. If your breeding plans also involve chickens, day-old chicks from Halaal Farms are the place to start, and you can place an order or message +233 24 915 1503 on WhatsApp. If you plan to grow the poultry side into a larger operation, our partner with us page is the next step. For the housing side of the same plan, see our snail pen and housing design guide.

Questions farmers ask