My daughter has a pit bull named Casius who is slightly over a year old. Casius has been a very sweet dog, kind, affectionate and even lets our 19 year old cat bully him around. Last nite my daughter told us that lately, Casius has been aggressively going after other non-neutered dogs...growling, spitting, just making a scene. One day, her boyfriend had to pull Casius off of a dog and when he did, Casius turned and growled at him. She's wondering if neutering will calm him down. She's worried because she's expecting a child soon and doesn't want to be in a situation where she has to control a 75 pound animal while pregnant.