First time in the garage? He knew it was there before so I’m really thinking he is doing what BJ does. Something is outside of there. He is in antsy attack mode and feels a need to go out and chase something maybe? His aggression may be getting redirected because he can’t chase off intruders. Knowing his history, another cat is all it would take for him to be upset. I used to live in an area where my neighbors cat sprayed my front door constantly. I tried to work through it with the neighbor but no luck. I started spraying the wood trim of the door with lemon furniture polish to protect the wood. Turned out the cat hated the citrus scent and steered clear. You could try that on some wood areas outside. If Finn does go in the garage, make certain you never open the outside door while he is in there. Never! If something is out there and he hears it he could go straight into attack mode and be out.
I know time is limited for exercise. I have to spend much time divided here. There is something I have been looking at that I think some of my cats would use. The wheel.” My fast cat “has them. It’s an investment and the kitty has to understand how to use it but it’s basically a giant hamster wheel. I kind of think Finn might be a good candidate for that. Just another thought. Try the citrus and see if that helps. We know that other cat is out there. He is probably coming near since all cats understand where there is a cat lover in a house.
My other thought is that you’ve been gone and then you were back. Maybe some “acting out” going on. Charlie giving a head washing is a good thing. Sign of caring.
I know time is limited for exercise. I have to spend much time divided here. There is something I have been looking at that I think some of my cats would use. The wheel.” My fast cat “has them. It’s an investment and the kitty has to understand how to use it but it’s basically a giant hamster wheel. I kind of think Finn might be a good candidate for that. Just another thought. Try the citrus and see if that helps. We know that other cat is out there. He is probably coming near since all cats understand where there is a cat lover in a house.
My other thought is that you’ve been gone and then you were back. Maybe some “acting out” going on. Charlie giving a head washing is a good thing. Sign of caring.