Yes, it is. You just have to make sure the cat cannot lick it, because it will make them sick; it won’t kill them, they just get this look on their face that they are pretty mad about how they feel, begin to salivate and then throw up. I know this because it happened to my cat. Boy was he mad at me! HaHa
But this worked so well on the bite he received right above his tail. It healed right up and all the hair grew back without any sign there had been a wound.
You could use a little cone collar until it dries and soaks in or put a baby t-shirt on them; the best part is you only have to use this 1 time every 3 days.