[Sundae]

Not with the spraying, but with the fighting - yes.
I had to leave a cat in London because I could not move two fighting cats back to my parents' house. I still feel guilty about that - Hely was a gorgeous cat who deserved better than to form a bond with me and then get shunted off to another home.

But Diz is a bully. He is jealous and cannot bear another cat in the house.
He terrorises my parents' cat, Mia. He is all sound and fury and on the odd occasion she stands her ground and swipes at him, he stalks off perturbed. But we have to have separate cat shifts so that they don't come together. The only time they can be in the same place at the same time is in the summer, in the garden. Mia roams all around the neighbours' gardens but Diz will not leave ours. So at the worst he will chase her to a fence and she'll be up and over.

I seem to remember reading that if cats don't settle in six weeks then they never will.
But that's going to be a long six weeks of you are getting blooded.

Are you sure the SPCA will put him down?
Many people are interested in adopting single cats ie for a one pet family.
Do you have a shelter with a non-euthanising policy?

Not saying get rid of him, just suggesting possibilities.

Glad I am not back in your position having to choose between cats.
My heart goes out to you.
Good luck.