HELP! MUSCOVY skin and bones

[chickmamat]

Please help! I adopted two Muscovys over a month ago. They both did great and were quarantined for two weeks. Seemed to be the picture of health, were laying eggs. I do not know their age, but they appear to be young.

The smaller of the two and younger, from what I can tell, is now seriously under weight. I can feel all her bones and her breast bone feels razor sharp. She weighs next to nothing. The wind knocked her over yesterday and I had to help her up and in just two weeks she’s lost so much weight. She is no longer laying eggs either. Doesn’t have much of an appetite. She stands with her shoulders hunched up and never extends her neck. I have attached a photo.
They were kept in a small cage and intended to be meat birds. Someone bought them to rescue them and they eventually made their way to me. That’s why their wings are so bad. I think she might be losing feathers as well.

I’m not sure what to do. This all started around when I integrated them with my chicken flock. I initially figured they were stressed and would settle but after realizing how much weight she has lost I am very concerned.

 

[chickmamat]

I don’t know if I should deworm her? Or give her antibiotics? All I have access to is Tylan, so idk if it would even help.

I separated them from the chickens again in case she’s just not able to eat because of stress and pecking order. But she didn’t touch the food I gave them.