My dog Zeus (intact) has recently became aggressive with our other dog Bingo (neutered). I think there is a dog around the block that is in heat but I'm not sure. Bingo is a 12 years old standard poodle that weighs 75 lbs and Zeus is 3 1/2 Colorado Bulldog that weighs 120 lbs. Zeus has been in the family since he was 8 weeks old. His behavior is so off. We have never experienced this aggression u until now. Do I take him to get neutered and hope his aggression stops?