So Diego is only a year old and he's super hyper. My dad had two dogs and one of them attacked him and they both tried to fight each other after that. I moved into a new home and they have 3 dogs and the two females hate him but her boy loves him. Both females also attacked him, and he fought back. He is the sweetest baby and I took him to the dog park multiple times a week and he never had any problems. But if a dog attacks first, he will fight back. He has never been the aggressor. I will say though, I monitor and limit his playing because he just gets soooo excited lol Cats are iffy. My mom has a cat that lives indoors and he put Diego in his place and he quit messing with him. My friends have cats that are outdoors and he chased them. and Birds are a no go. Including chickens. He will chase until he catches one. My take with children. He's been around my 3 who are all ages 7 and under and he's been fine. He's been around friends children and does fine. She was 4. But older children he plays really rough with if they allow it and has ripped clothes. He gets too excited when he's allowed to be rough so I don't allow it. He's crate trained, and he knows basic commands but can also be very stubborn. He was born in February, I used the 14th as his birthday. His mom is a brindle pit and his dad was a white American bully.