I got Gizmo neutered at about a year because where we were living he was the only male. There was a female pitbull and a Chihuahua/Pomeranian mix. So he wouldn't get either one pregnant (cause you never know) I had him fixed. It fixed his territorial marking problems and mounting anyone and anything, but I feel it made him more aggressive towards other dogs. Is it because we got him fixed to late or is it normal behavior?
