bob, we decided this year to go non medicated and we have used medicated for 30 years. we use a rotational system with the chicks and so far, am on my 4th hatch with no losses. since we eat our eggs and eat our extra cockerels, we don't want amprolium or arsenic in our chicken feed. the cubalayas are pretty disease resistant anyway but we are watching the australorps and delawares closely. bloody stools or death would probably make me rethink the whole thing.