My 3 year old yorkie always seems to get this circular red rash on his back. We have taken him to the vet many times and he gives him a cream and a shot to take 3 times each time but it keeps coming back. When it occurs, he gets depressed and sits under the stairs by himself and is not his normal and playful self. I dont know what it might be and since I live in Qatar, there arent many good vets around. The rash is on his back towards the lower part and there are currently 2 circular rashes. I have realized that this happens when the weather gets a bit hot. He rarely goes outside and stays in the house so i dont know what the cause might be if someone can please help. thank u.