We have two cats, one of whom (a neutered male, 14 yrs) is very aggressive towards any other animal who comes into his territory; fox, dog or cat. Our younger cat (female, 4 yrs) is dim, and keeps forgetting the “rules” that the older one has established – and he is unforgiving, initially leaving the screaming youngster with “holes” in her fur. luckily she is very furry! However with pet remedy in place a magical restraint seems to come over the house. I always know when the diffusers run out, as the aggression starts again.

The male still enjoys a fight and roams the neighbourhood looking for other cats to trounce, but at least our home is peaceful. We keep hoping that as he ages he will calm down, but no sign of it yet.