His nose looks worse than PEbbles' did, and hers was precancerous scabs. I did do some research on the op, and it isn't recommended in cats as it can cause issues with sinuses and the like. Pebbles had the monthly steroid jab which calmed hers down completely, she had either 2 or 3, and it stayed away for months - sadly she then became ill with something else. It might be worth looking into