Need some help please. Can Mareks be seen in a chick of 4 weeks old that is indoors? From what I've read, it say usually between 12-20 weeks old. I have a chick that was flopping around yesterday morning in her cage, seems to have lost the use of her legs and was using her wings to stay upright. But when I picked her up and set her legs into my hand, she stood up. I thought maybe vitamin deficiency, and gave her some poly vi sol, but she has stayed the same, legs spread and wings holding her upright. She had splayed legs when she hatched but it was corrected within that first week and was walking fine until now.
Mareks from research I've done all say no. On occasion some will have issues from hatch following death even after a week. I have seen flipping as if convulsions at a very young age due to mites/lice after being hatched by a broody. Even in older chicks displaying what appeared to be paralysis due to mites from lumber used to build brooder that was stored outdoors. Over the years seeing these symptoms even by a peachick broody raised..falling over off balance I quickly treated with Ivomec eprinex drench and see immediate results. It takes no time at all for external parasites that manage to find their way to the chicks and their tiny bodies can't handle the toll they take on them. Lice you can see if you have pretty good vision. Mites you will not typically. It wasn't until I culled an entire brooder batch that I hatched from shipped eggs I panicked then once the birds were gone the brooder was crawling with what looked like thousands of mites!! Just sayin'.