Malibu's Mom is right. Feliway is great to help calm him down. I use it all the time when my cats get riled up. It has an enzyme in it only cats can detect and works immediately!! Stacking baby gates in the doorway helps too.

Years ago, before I learned all these neat tricks I tried to keep RB MooShoo out. He ruined the carpet in the doorway. I finally gave up and just kept the door open. I never should've shut it to begin with!! I sure miss him.

Declaw him and you'll have more problems you ever could imagine, i.e., litterbox issues, pain constantly, biting., to name a few.

Another suggestion would be to have "Soft Paws" put on them. They can scratch all they want but it won't do any damage.

I do hope you can resolve this issue without resorting to torturing your cat for something that comes naturally to him. He loves you and WANTS to be wth you!!