My chicks are 3 weeks old and spend a lot of time with the dog... They have gone from picking the occassional cat/dog hair from my clothes, and the sheet I put over the floor, to picking loose hairs straight from the dog. Unless they actually pull on one of his chin whiskers, he doesn't move. Should I be worried that these will clog their digestive system like a cat with a furball? Has anyone actually had a problem with this?