HI, I'm Dr Steve
NOt to be redundant , but you are absolutely sure that there are no fleas. This is the single most common cause of itching in dogs in my practice. Some dogs can be allergic to the saliva from a single flea bite and fleas can be very difficult to see.
Sometimes as you are looking for them they feel the vibrations from your fingers and they simply scurry to another part of the body. Another thing to look for on the skin is flea manure. This looks like black pepper shaken on the skin ( littel specks) usually on back half of the cat above the hips or on the belly. IF you are sure there are no signs liek thisI will continue with other possibilities, OK?
WIth him responding to antihistamines, it is possible that he has allergies. When dogs suffer from allergies, they become very itchy and they can scratch. lick or chew themselves to the point of causing bleeding sores n the skin. They often lick their paws excessively, but they can be itchy anywhere on their body.
Can you see my answers so far, we have been having a little with the "chat" mode ?
How long has this condition been going on?
I am going to switch to question and answer mode to see if you can see my replies
why am i being charched £28 when it said £13 if this is the case i will cancel it through my credit card