Silkie Chickies / Free tips
Medicated starter does NOT contain antibiotics. The medication is amprolium, which slows the parasite that causes coccidiosis so chicks can build immunity. Medicated feed makes sense in high-risk brooders; many experienced keepers use non-medicated feed and manage risk with cleanliness instead. One firm rule: chicks vaccinated against coccidiosis should generally skip amprolium feed for about 28 days after vaccination.
You will find strong opinions on both sides of this one, and confusing answers everywhere. Most of the confusion comes from one misconception, so let's clear it first.
The medication in most chick starters is amprolium, a coccidiostat. It is not an antibiotic. Coccidia are microscopic parasites that live in soil and droppings, and in young chicks they can cause coccidiosis, a serious intestinal disease. Amprolium does not kill all the coccidia. It slows their reproduction by interfering with how the parasite uses thiamine (vitamin B1), which buys the chick time to develop its own immunity while lowering the risk of severe disease.
That thiamine detail is worth knowing: thiamine also matters for normal neurological function in the bird itself, which is why amprolium is dosed carefully and not meant to run at high doses forever. The documented concern with amprolium is dose and duration, not any particular breed.
The goal is not to eliminate every coccidia organism. It is to let the immune system learn to handle normal exposure. Keepers who go non-medicated lean on prevention instead: dry bedding, frequent cleaning, no overcrowding, good ventilation, fresh water, quality nutrition, and low stress. Managed well, that approach works, and it is a fully valid choice rather than a shortcut.
Some hatcheries vaccinate chicks against coccidiosis. Those chicks generally should not eat amprolium-medicated feed right after vaccination, because the medication can interfere with how the vaccine trains the immune system. Many hatcheries and feed makers specifically recommend non-medicated starter for vaccinated chicks, some for roughly the first 28 days. If you buy vaccinated chicks, ask the hatchery which feed they recommend and follow it.
Brooder setup, feed by stage, the calcium timing trap, and Silkie-specific fragility are all covered step by step in the upcoming Silkie Chickies Handbook.
Follow on TikTok Follow on InstagramWe are not veterinarians. This is owner-to-owner experience plus published feed and vaccine guidance; confirm health decisions for your flock with an avian vet.
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