Sonny will be 9 on April 15 he has been with our family since he was a puppy and is a wonderful dog. Sonny enjoys walks along Chicago's lake front, soft blankets, pizza crust, belly rubs and watching Law & Order. Unfortunately, Sonny resource guards and there was an incident with our 19th month old son. Sonny broke skin and we no longer feel comfortable having Sonny in the home with a small child. I do not know how Sonny would interact with a cat he has never come into contact with one. In regards to other dogs Sonny either loves them or hates them. If you already have a dog and are located in the Chicago area I would be willing to set up a doggie play date to see if the dogs get along.