cat beds. I just started using those green scour pads for dishes. Oh my gosh, they work great and last forever. My cats have small rugs you can get for a couple of dollars in their area. The green pads get up every bit of hair. Where have they been all my life? To remove the hair, I just go out and rub the pad on the bark of a tree and it comes off. Probably all the birds are using it for nests. Give them a try.