We have a large indoor aviary that was housing 3 male zebra finches and a breeding pair of doves. Well, 2 of our finches took an interest in the dove nest and would spend a bit of time in it throughout the day so when our doves laid an egg (infertile) I decided to get all 3 of our finches their own nest... 2 of them took interest in it and the 3rd finch didn't want anything to do with it... My question is... Our 2 male finches have been nesting together in both separate and conjoined huts that we provided, while feeding them and watering them, my hubby noticed today that one of the finches was missing alot of the feathers in his back of the neck... I didn't notice it at first from the angle he was at but when the finch came straight in front of me, I saw it It seems as if 2 of our finches are ready to mate (don't have females yet) but the 3rd isn't ready... Could he be younger than the other 2? Does it seem like the others who are nesting are likely plucking his feathers out in his neck? (I ask that because I have seen them in the doves nest digging for feathers and then going back to the nests with a feather in each of their mouths that the doves had used in their nest.) We were worried it may be mites but the other birds aren't losing feathers and theres no bugs or anything that we see on him or in the cage. We did separate the little finch in his own cage for the time being to see if his condition gets better and probably won't be putting him back in the group until we get females for the others... Just wondering what I can do to get his feathers to grow back...I believe they will as I can see little spots on his neck where it looks like they are trying to come back in...Any ideas to help him recover??