Hi Everyone! I am really hoping someone can help me as I am new to chickens this year. I have 10 birds that approximately 3 months old in a flock together. Seven are blue/black/splash Orpingtons and three are Comets. Two of the blue Orpingons are starting to have issues with their feet and legs. Neither can walk at this point and they seem to be scooting around on their hocks backwards. Someone in the flock has brown, runny poop. As far as i know, they were not vaccinated for Mareks or any other disease, which i am now really regretting! All of the birds have been eating and drinking well. (I put the two having issues right next to the food and water and they do really well) The birds are housed on wood shavings. The cockerel who is having issues has always been the biggest bird in the flock since he was a chick and was always a little uncoordinated i think. The pullet was fine until a couple of days ago.( she acted completely normal) I think all of the birds with the exception of the Comets have been sneezing a bit and making a barking coughing noise, but not all the time. The respirations and breathing is a little elevated i think... Does anyone think this is Mareks? What can i do for them? Am i going to lose my whole flock? Do i need to put the two birds who are semi-paralyzed down? Help! I really love these birds and i am so upset that they are sick!
This is the pullet
This is the cockerel
This is the pullet

This is the cockerel
