I have a chihuahua named Jojo who is about 4 years old who I adopted in spring of 2011. He never had hair on his tail. But in December of 2012 we noticed a small amount of hair loss on him in the middle of his back. Since then, his hair loss has spread. His back is patchy, his back-legs and...

Two days ago we noticed long, thin, black bugs crawling on Groo. They don't look like fleas! We used a topical flea treatment on him yesterday morning and didn't see any bugs on him by the end of the night but then this morning I found a few crawling on him. I don't know what they are, they're...