I can't get him to stop!

[Karen]

How long has this been going on? Can you put down something impervious to claws for a week or so, and see if that makes him bored with the whole process? Do you play with him to tire him out before bedtime?

[Freedom]

I think Karen is on the right track. Riley wants to be with you, his humans. He doesn't feel like he is getting enough time and attention from you.

[Medusa]

I think Karen is on the right track. Riley wants to be with you, his humans. He doesn't feel like he is getting enough time and attention from you.

This is true especially b/c you have other cats. Riley wants equal time.