My name is Apollo!

Hello Everyone,
My family needs your help. My family fostered a dog from a person who could no longer afford the cost of living and a furry friend. He is a red nose named apollo who we believe is just over a year old. He has some resource guarding issues. He has also gotten aggressive with letting others touch our female dogs. We can no longer keep him due to his aggression. We are currently trying to find him a new home, however we do not feel comfortable just simply giving him away to someone with no experience with a pitbull or with no training experience. We believe he is a good dog at heart but unfortunately we cannot have a dog who we do not trust in our home. He is an overall good dog, great on walks, loves the outdoors, easily potty trained and very food motivated. Very vocal. Please help us find him a good home!