Sorry that you are dealing with illness in the other animals. At 4 years old, I don’t think they had a bad hatch. Mareks symptoms usually show up much earlier in the first year of life, unless they have recently been exposed by a new bird in the flock who is a carrier. So many things can look like Mareks, so it would be good to rule out other things. Getting a necropsy by your state vet is the best way to know what was going on inside them. If that is not possible, I do home necropsies to look at and take pictures of the organs. Post any here for comments.Thanks I’ll add some B vitamins.
Their feed is 100% dry. We haven’t had any moisture in weeks. In fact our temps have increased a lot lately. It’ll be in the 90s this week.
Could the heat stress have exacerbated something already there?
So, I know vaccination doesn’t 100% prevent Mareks, but isn’t it odd to have two chickens have the vaccine fail on them? Maybe something happened with their batch at the hatchery?
I just really don’t want my other 3 hens to get sick.
One last thing…should I make Goldie a sling so she isn’t putting so much pressure on her lame foot? Or just let her be?