Ok so basically I am now getting my dog put down, he has viciously attacked a female nursing dog and I am mortified. He was always a bit odd araround other dogs and I decided to get him neutered as recommended by the vets because im20 wweeks pregnant, and I didn't want anything bad happening. He has never attacked anybody or any other animal before this operation, he was just snarly and didn't like the presence of other dogs, but since we paid to get him neutered he has been incredibly baddly behaved and now even attacked a female dog. I told my vet this to wich she replied 30% of dogs that weren't aggressive beforehand become aggressive once neautered, and for another 30% the operation makes no difference :o