My sweet boy (6 years old) started losing weight late November despite his good appetite. I wormed him, dusted for mites. He would go out of his way to find feral cat poop to eat. I pulled it out of his mouth multiple times. I gave tylosan for ten days. He then had slime looking saliva. I couldn’t see anything in his mouth to indicate thrush or canker. The only thing he wanted to eat was scrambled egg and dry cat food. He passed tonight. My avian vet has been overbooked then closed for holidays. I feel I failed him. Any idea of how to reduce risk to the remaining flock? He was separated but since I don’t know what he had I don’t know how to prevent.