I have a 5 month old red silkie rooster that has been vaccinated for marek's virus as a chick, and he has stopped eating and drinking. I treated for coccidia, checked for mites and poultry lice. It appears he may have been bullied when I put him and his siblings into my juvenile coop with a few other birds. I found him withdrawn with his head down in the corner of the coop. I have been tube feeding him for several days now, and he is doing ok. Preens, chatters but still not eating or drinking on his own. I have in his tube feeding food, electrolytes, water, nutridrench, vitamin E with selenium, pumpkin, yogurt and nutrena chicken feed. At a total loss as to what caused this as there were no outward signs of illness as would be seen with upper respiratory or parasites. Has anyone else had this happen? And how did you treat?