for some time now my dog has been biting back on his back and now fur has started to come out from areas on his back on each side (not too much but its there)
he's been to the vets and tests came back ok.
has anyone any idea what this can be and advise me what to do now?
thankyou

What tests did the vet carry out?  Did he check the dogs anal glands?  Impacted anal glands can often be the reason behind chewing the paws of the base of the tail.....  Other causes can include flea allergies.