I have a Scottie that has lost quite a bit of hair on the top part of his tail. His coat is ruff, coarse feeling,and sheds a lot too. I have tried other meds/supplements without any improvement! We are on our 2nd shipment of the Collagen. His overall hair is so much softer now and the balding area on the top of his tail is filling back in with hair. He is not shedding as much hair either. He has had a lot of skin allergy bumps that nothing has helped either, but after using the first couple of bottles of the Collagen, he has had no more scabby bumps. He looks like a different dog now. His coat is soft and shiny. He takes the Collagen well on his food. No problems. We Love this product and have been recommending it to other people with dogs.