Short answer: Premix is a small bag of vitamins, trace minerals and sometimes amino acids that gets blended into the main feed so the ration covers what maize and soya cannot supply. It usually makes up a small share of the feed, and it is the part that loses strength first in heat, damp and light. Buy premix with a clear label and batch date, keep it sealed and cool, and use it before the date. If birds show bent legs, weak bones or poor growth, check the premix and the mixing before you change anything else, then ask your vet or a feed adviser.
Key takeaways
- Maize and soya carry no active vitamin A, no vitamin D3 and no vitamin B12, so premix fills that gap.
- Premix is a small share of the feed, and more is not better, because some vitamins and minerals become harmful in excess.
- Vitamins lose strength first in heat, damp, light and time, so storage is part of the product.
- Read the label for the species, the stage and the batch date, not only the price.
- Bent legs and weak bones have several causes, so check the premix, then ask your vet.
Why maize and soya leave gaps
Maize and soya are good sources of energy and protein, and they form the backbone of most Ghanaian feed. They are not complete. Plants carry no active vitamin A, no vitamin D3 and no vitamin B12. The carotene in yellow maize is a precursor the bird has to convert, and that conversion is not reliable enough to bet a flock on. Trace minerals such as zinc, manganese and selenium are present in plant feed too, but in amounts that depend on the soil, the variety and the season. The same bag can differ from one harvest to the next.
That is the job of premix. It is a controlled supplement that brings the vitamins and trace minerals up to the level the bird needs, whatever the raw ingredients happen to contain. Without it, a flock on maize and soya will grow for a while, then start to show what it is missing. The usual places are the bones, the legs, the eyes, and the hatch rate in breeders.
Ready feed from a reliable miller already contains premix. Home-mixed feed does not, unless you add it. That is the first thing to check, and our article on mixing your own feed covers the sums behind that choice.
What is actually in the bag
A premix is a blend, and each group inside it does a different job. The table sets out the main groups, what they do in the bird, what the bird looks like when a group runs short, and the storage risk for each. The signs are typical examples only. Any of them can have other causes, and none is a diagnosis.
| Group | Examples | What it does in the bird | Signs when short | Storage risk |
|---|---|---|---|---|
| Fat-soluble vitamins | A, D3, E, K3 | Vision, bone, immunity, clotting | Watery eyes and poor growth (A); soft bones (D3); nervous signs and weak chicks (E); slow clotting (K) | Heat and light break A and E down |
| B vitamins | Riboflavin, niacin, pantothenic acid, B12, biotin, folic acid | Energy release, nerves, feathers and growth | Curled toes (riboflavin); bent legs and foot problems (niacin, biotin); poor growth | Moisture and time |
| Trace minerals | Manganese, zinc, iron, copper, iodine, selenium | Bone, skin, feathers, enzyme work, eggshell | Short bones and bent legs (manganese); poor feathering (zinc); muscle problems (selenium) | Speed up vitamin loss when mixed in |
| Choline and others | Choline chloride, sometimes amino acids | Fat handling, growth, protein building blocks | Poor growth; leg problems in fast-growing birds | Choline takes up moisture and clumps |
The fat-soluble vitamins are needed in small amounts, and they are also the first to fade in a hot, damp store. Keep that in mind when you decide how much premix to buy at once.
Reading the label without guessing
A premix label is short, but it tells you a lot once you know where to look. Most of the useful information sits in small print on the side of the bag.
- The species and stage it is made for: layer, broiler starter, grower or finisher. A layer premix is built for egg production, so its vitamin and mineral levels differ from a broiler premix, and using the wrong one is a common and expensive error.
- The guaranteed levels per kilo or per tonne for the main vitamins and minerals.
- The batch number, the date of manufacture and the best-before date.
- The forms of the vitamins. Coated or stabilised forms of vitamin A and choline keep better in heat than plain forms.
- The inclusion rate, which is the share of the total feed the premix should make up.
- The storage instructions, and any warning about mixing with other products.
If the label gives a range instead of a guaranteed level, ask the supplier which figure they stand behind. A range is not a bad sign on its own, but you should know the number you are paying for.
Is the premix already in the feed you bought?
Most farmers assume it is, and most of the time they are right. The question is still worth a phone call, because a bag labelled as a complete ration and a bag labelled as a concentrate are not the same thing.
A complete feed has everything in it: energy, protein, minerals and vitamins. It needs nothing added except water. A concentrate or protein mix carries protein and some minerals, and it is meant to be blended with maize or another energy ingredient. A premix on its own must be blended into a larger batch before any bird eats it. Ask the miller which of these you are buying, and ask for the formula sheet that shows the premix is in it. Keep that sheet with your batch records, and our layer mash article explains the choice between mash and concentrate in more depth.
How much goes in, and why more is not better
Premix is a small share of the total feed, and the share is set by the formula. The number on the bag is not a suggestion, and more is not safer. Some vitamins and minerals become harmful at high levels. Excess vitamin D3 pushes calcium into soft tissue, excess selenium is toxic, and high copper or zinc can upset the gut and the feather quality. A farm that doubles the premix to be sure has usually made the flock worse, and in some cases has made it ill.
Less is also a problem, and it is harder to see. A short dose of premix gives a flock that looks fine for a few weeks and then starts to lag. The growth is uneven, the legs weaken, and breeders stop hatching as well as they did. Use the rate on the label, weigh it properly, and write the figures down so you can check them later.
What wrecks vitamins in the store
Premix does not go off in a day. It loses strength gradually, and the rate depends on four things: heat, moisture, light and time. Heat is the fastest. Vitamins break down quicker as the temperature rises, and a bin standing in direct sun in the dry season can be far warmer than the room. Moisture comes second. Damp makes premix cake and clump, and choline chloride takes up water readily. Light hurts some vitamins, particularly riboflavin and vitamin A, so an open bag on a sunny bench is a problem. Time is the quiet one. Even a well-kept premix is weaker at the end of its date than at the start.
Trace minerals add a fifth problem. When they sit in the same mix as the vitamins, they can speed the breakdown of some vitamins. A premix that is mixed in and used soon is always a better bet than one left sitting in a finished feed for weeks.
A storage routine that keeps premix potent
Storage is part of the product. A bag bought in good condition can lose value on the farm, and the loss stays invisible until the flock shows it. Set up a routine that lets the store do its job. Our feed storage article covers the wider store, and the points below apply to premix in particular.
- Keep the sealed bag in a lidded bin, off the floor and away from the wall, where damp comes through.
- Write the opening date on the bag the first time you open it, and close it after every scoop.
- Buy only what you can use in the next few weeks, so the stock does not age on the shelf.
- Store it out of direct sun, and away from fertiliser, pesticides and strong-smelling products.
- Use the oldest bag first, and move the new stock to the back.
- Check each bag every week for lumps, colour change or a musty smell, and set aside any that look wrong.
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When the flock points at the premix or the mixing
Nutrient shortfalls rarely show all at once. They appear as a pattern across the house, and the pattern tells you where to look. An uneven flock, where some birds are much smaller than others, often points at mixing, because the premix did not spread evenly through the feed. A flock that is short across the board, with weak legs and slow growth, points at the premix or the formula. A breeder flock whose hatch drops suddenly may point at a vitamin or mineral problem, but it may also be disease, age or temperature, so do not jump to a conclusion.
Start with the cheap checks. Look at the premix date and where it has been stored. Ask whether the batch was mixed the same way as last time. If you need a formal answer, send a feed sample and the premix to a laboratory, and ask your vet to look at a few birds. Do not change the premix on a guess, because a change that fixes nothing still costs you a cycle.
What we tell buyers who mix their own
We hatch chicks, and most of the premix questions come to us from people about to rear a first flock. Our advice is the same each time. Choose a premix from a supplier who gives you the label and the batch date, and keep a record of which batch went into which feed. When a problem turns up in the house, the batch number is the first thing you will want.
The hatchery vaccines go in before the chicks leave us, and the batch record lists each one. Keep that record beside your feed record. A flock with a clear start and a clear feed history is far easier to diagnose if something goes wrong, and it gives your vet the facts without guesswork.
If you are still deciding what to buy, our broiler chick page and layer chick page show the breeds we hatch and the current starting prices. A Hy-Line Brown chick starts at GH₵ 23, and our breed guides explain how the birds differ in feed needs. You can place an order on the order form, or WhatsApp +233 24 915 1503.
Checklist: the premix you can trust
Use this before you buy the bag and again each time you open a new one.
- Confirm the premix is for the right stage and species, layer or broiler, starter or grower.
- Read the guaranteed levels and the batch number, and compare them with your formula sheet.
- Check the best-before date, and buy only the quantity you will use in a few weeks.
- Store the bag sealed, off the floor, away from damp walls and direct sun.
- Record the opening date and the batch number in your feed book.
- Mix it in evenly, and never add extra to be safe.
- Look at the birds every week, and call your vet early if the pattern changes.
Questions farmers ask
Do I need premix if I buy ready layer mash?
Usually not. A ready layer mash from a reliable miller should already contain the premix, because it is a complete feed. Check the bag and ask for the formula sheet to confirm it. If you are buying maize, soya and other ingredients separately to mix at home, you do need a premix, and it must be blended in as the formula directs.
Can I make my own premix?
Some farms do, and it is a precise job. Trace minerals and vitamins are needed in small amounts, and a small error in weighing can leave birds short or harm them. For most small and medium farms, buying a tested premix from a supplier who gives you a label and a batch date is cheaper than the cost of one bad cycle.
Is premix the same as a poultry supplement or vitamin water?
Not quite. Premix is a feed ingredient, blended into the main feed, and it supplies a balanced set of vitamins and trace minerals. A supplement or vitamin water is usually a short-term extra for stress, given in drinking water. The two can sit together on a farm, but a supplement does not replace a premix in the ration.
How long does premix last once opened?
Use the best-before date on the bag as the outer limit, and keep the bag sealed between uses. In a hot, humid store, use it sooner, because potency falls before the date. Write the opening date on the bag, and set a rule that you will use each bag within a few weeks of opening.
Can premix stop bent legs in broilers?
It can prevent the nutritional side of the problem if the premix is right and it is mixed well. It will not fix leg problems caused by infection, injury, fast growth or a disease of the bones. If birds are struggling to walk, call your vet, who can examine them and check the feed.
Is more vitamin better for fast growth?
No. Extra vitamins do not make birds grow faster, and some become harmful in excess. Vitamin D3 is the classic example, because too much pushes calcium into soft tissues. Stick to the rate on the label and the formula, and trust the feeding plan rather than extra doses.
Do layers need a different premix from broilers?
Yes. Layers are building eggs and shell, and they need different levels of several vitamins and minerals from a broiler feeding for growth. Using a broiler premix in a layer feed, or the other way round, is a common mistake. Check the species and stage on the label before you open the bag, and our <a href="/faq/">FAQ page</a> covers other common buyer questions.
