These broiler birds were bought day old from CHI through a vet at the cost of 250naira in a chi branded cartons sealed, they will be 7weeks by friday 9th september yet dont look it. I feed very well and the enviroment is very conducive all I see is a slow growth in some stunted growth in others I visited the vet doctor and he was apologising claiming everyone that bought CHI then is complaining of slow and stunted growth what do I do.