Converting Outdoor to Indoor

I'd like our two young indoor/outdoor cats to become indoor only. We cannot do this at the moment... the reason is long and trust me, at the end you would agree it can't be done right now.

BUT, we are going to buy a house next year, and I think that would be the ideal time to keep them inside after moving, and then just keep them inside.

I think Lily will adapt pretty easily, but Sparkle is NOT going to be happy about it and she can be quite destructive! She also intensely dislikes Lily and has never accepted her at all. This is one of the many reasons I want her indoors because we hardly see her inside anymore. She gets very aggressive when she sees Lily. I think she feels that the house is Lily's territory. I've heard about a pheronome spray that calms cats. Does anyone have experience with it? Also, do cat fences work?

Thanks for any insights and advise for converting these two!

Cheers, from
SwampWitch

p.s. Old Oberon is always going to go out to the back yard for his sun bath. (Everybody gets along with Oberon.)

It's called Feliway.
But I hear that the room diffusers are much more effective (but more expensive) than the room sprays.
I haven't used it but people here have raved about its results with disorder in their "catty" households.

Good luck with it!

When you move is a perfect time to switch to your kitties to being indoor only. My suggestion would be that if possible, follow the guides on how to introduce cats as though your kitties had never met before. You may be able to reduce some of the conflict between them that way.

Thank you both for the suggestions! cloud_shade, I will definitely do that. They never had a proper introduction; Lily was a surprise Christmas gift, when we had a full house of visitors, and it was a very busy time.

Cheers, from
SwampWitch