pulling fur

My dog is biting and scratching and pulling his fur out. He has now got bald spots here and there on his rump where he has been biting, they bleed a little and sometimes there is a little puss/yellowish liquid. After a day it gets scabby, then he itches again. Took him to a vet, they said...

Our 11 year old Golden Retriever has recently started pulling out the fur on the insides of his front legs and between his paw pads. He's licking the skin on his legs and his pads raw, and is starting to bleed. He's also scratching more than usual. I don't think it's fleas or insects... he...