Our Abyssinian Brothers Don't Get Along Anymore.

We have two beautiful loving & loveable male Abyssinians, Mickey & Louie, now 11 years old, in excellent health.
When we got them, we were in business & lived above our Shop, also travelled to another home at weekends & they were just fine, well-behaved & absolutely no problems.
About 3-1/2 years ago we retired & having sold those properties, we moved to another home, & will be staying put, until old age changes things.
Although, we had been staying weekends here before moving, there were no problems with our two cats, but since we have been here full time, they no longer get along & we have to make sure that they separated at all times (one in, one out, & so on), otherwise Mickey will hiss & growl at Louie, & then Louie will chase Mickey & a fight ensues.
So, can anyone help us with this problem? We have tried Feliway & hormone injections, but these have made no difference & the Vets have not come up with any solution. Thank you.

 

Obviously you've rule out any health problems with either one of them.
I'd treat them like they were brand new kitties meeting one another.
Keep them isolated (one in a separate room for a couple of days, switch room, etc.) for about 7 to 10 days.
Then slowly start to reintroduce them. When they start to meet one another distract them with their favorite treats, favorite toys. Keep them engaged in something other than each other when they meet. If they start to behave then extend the time they can spend together (with you keeping them busy).
Another trick is vanilla extract - put a dab right at the base of the spine right where the tail meets the back. That way they will both smell like vanilla. I have never tried this but I've heard it works.
I'm going to assume they are both neutered. If not that can start to cause some problems with them too.

 

Good advice Mary, I had never heard of the vanilla extract but it makes sense.

sorry to hear BeeJay that they are not getting along.

 

Thanks Mary - yes, Mickey & Louie were neutered as kittens.
The Vet did their vaccinations not so long ago & said they are both in excellent health.
They eat & drink well, but although solid enough, they are not overweight.
We will try the Vanilla extract & see what happens.
There are some times that we do have them together, but not very often.
In the winter months, we have them both in the warm room with us, Mickey sits on my husband's lap & Louie on mine, but we must stay alert the whole time, in case of aggression, & usually end up by putting one in another room (we vary which one, in case of jealousy).
Another time they are together, is in the cat cage, going to the Vet's or the Cattery, in both cases, about an hour's drive each way. This is the best time that they are together, because after a short while, they begin to wash each other's head, & this is how they used to be together, before we made our last move.
We live in hopes that one day they will be like they were, again.
Will let you know if the Vanilla works & thanks for your reply, Mary, & thanks for your sympathy, HDrydr.