We have two cats, who don't get on very well. We've had both of them for 8 or 9 years now, and I know the source of the problem (our male cat wasn't properly socialised as a kitten), and mostly it's fine.
But for the last little while, we've been woken in the night pretty often by cats hissing etc. I think this has always just been our two fighting with each other. But I'm not 100% sure.
Last night I was woken by a cat fight. In our bedroom. The fight went down the stairs and then ended. There is quite a bit of fur on the landing. I found our male cat, and checked him over.
Ah, I've just now found my female, and she's fine.
So clearly our two are just hissing at each other, but some other cat came in last night and got into a fight with one of mine.
So. Is there anything I can do to get my cats to get along better?
And I've heard of cat flaps that only let cats in with a particular token on them or something? Do these work? How hard are they to install? The door is pretty solid, and I don't want to start cutting it more ...