I have a rooster who narrowly escaped getting killed by my dog about 2 weeks ago, he lost a lot of his feathers, and a few bits of skin, then he had some punchers on his back. He is doing quiet well, no sign of infection and he is healing nicely. But my birds had lost some weight before the attack. And he was one of them, then for a little while he was not eating. He started eating again and acting more lively. But he is now considerably light and there is no heat where he is at so I feel like that is burning through what he does eat. Is there anything that will help him gain weight at a good pace and keep him healthy? (btw his water has electrolytes and vitamins in it) I apologize if this is a dumb question, I'm just really worried.