They can do well with other dogs in the household or who visit regularly when properly introduced and supervised, preferably on neutral ground for the first few meetings so the American Bulldog in question can learn that this new dog has come to play, not to hurt his beloved family and home.They are not necessarily good with strange dogs, especially in chaotic environments like the dog park.The more exposure to good training practices and clear behavior expectations with other dogs and people, the more likely the success at being controlled both inside and outside of their environment and the natural physically strong and powerful nature of the breed can be channeled positively.