I know he'd be happier as an only cat and I don't think for one minute he'd pine or anything but I hate the thought of him stuck in a cat pen for however long it takes to find him a home; also, his age may go against him although he's perfectly healthy.
The only one of my others he's been overtly agressive with is Humphrey, who is the one in charge. Dave will wait until H is asleep and then just attack him for no reason. He doesn't do it often and it's over in a flash but I can tell he's not playing when he does it; when Humphrey's awake, Dave would never dream of having a go at him and is quite submissive.
I think I may have to make some enquiries with the CP but I won't rush into anything. Does anyone think it may help if [I know this sounds mad] I kept the house very clean and tidy? I'm not meaning to imply that I live in a tip
but Dave does seem to make a b-line for newly washed bedding etc and I was wondering if a daily household hoover and surface wipe down might help? At present it's a once a week job. I feel as if I sound like I'm grasping at straws a bit now..
He was still spraying when the litter trays were kept indoors.
Oh, and I forgot... we even tried putting Laminate down in the living room but I actually think the problem got worse then.