I have 4 cats before I brought Galen home. They were 12 year old brothers Rosencrantz and Gulidenstern, a 1.5 years male Saber (about 16 lbs) and 1 year old female Willow . There was a little adjusting. I have a few cat trees for them. He has been bopped in the head by a paw a few times, no claws. Just to let him know who is boss by Rosencrantz. They do like to sit on the couch and watch him do zoomies around the coffee table. . . I think it turned into a pastime for them. lol . . And Galen does love to hump Willow. . . He claims she is his cat ! And she lets him

. . Mind he is neutered lol
I do have to say the transition went so much better then expected . . I thought the cats would have more of a problem with him. . . But he was a puppy when I brought him home. They can jump on the couch or tree and get away from him. I do have an ex pen that I use to keep him safe when I go out. He does get into stuff. . .
I think if you want to dog get one. If you have any other questions ask or even PM me

. . .good luck