Combining households and cats - any advice please

[Thingsarel00kingup]

Long back story but it is looking likely that I might have to move in with a friend and we both have cats, plus I have a dog.

Mine are boy/girl siblings, 5 years old. They're oriental house cats (go outside when supervised, mostly due to my concerns about the road). Boy is neutered and a real softie. Girl isn't neutered but could be (and probably should be?). She's a bit choosy about who she likes, but eventually warms up or just ignores them!
They get on really well, with the occasional spat and rough play. Both get on well with the dog.

My friend has a male kitten that's 5 months old and is being neutered next week. He's a real sweetheart and has met and likes the dog.

The dog just loves everyone and everything! She's a bit older and completely soft.

So... my concern is how to introduce all the cats and ensure they get along. I really don't want any of them to be upset. Re-homing any of them is not an option.

Could it work?

First off get your girl cat neutered like yesterday and that will help with the introducing

Thanks, how does it help?

As a wild generalisation, girls are harder to introduce than boys. Do the fact you only have 1 girl is a good start.
Cats will get used to a friendly dog fairly easily too.
I think the fact that the extra cat is still a kitten will help too.
Get a Feliway multi cat household plug in (I should be on a commission for how often I recommend these!)
Go slowly and keep them separate for a few days, swap scents etc, then have supervised time. There are good videos on YouTube and the like that walk you through how to do this.
Good luck, I'd be pretty optimistic it will be fine.

Thank you so much, that is really reassuring. It's such an awkward back story and was never meant to be like this 😢 People IRL have said "just re-home them..." but I definitely can't and won't do that so want to make it the least traumatic for all of them. Thanks again for your advice ☺️

I have 3 cats and 1 dog. Introduced 2 if the cats (as kittens) about a year ago after the death of my oriental boy cat. New cats are orientals too.
All my cats are female...I get through Feliway but despite quite a lot of huffing and puffing at first, they get on ok. They're not pals but they rub along ok and don't squabble.