My Cockatiel, Jacky, has been losing his tail feathers gradually over the past few weeks. We've only have him for about 3 weeks and when we got him he only had 6 feathers on his tail. He's now left with one that looks like it's in the process of falling off. I've heard of birds losing all of his tail feathers at once after a stressful event like being grabbed, but never of one losing feathers over time. We do have cats but they have been very good around his cage and they're never around each other without supervision, in the cage or out. Even though we haven't had him for long I've really fallen in love with him and I don't want him to be sick and miss the signs. Please help!!