Nigel Tucker
New Born Pup
I have two rescue Guinea Pigs. Both were from the RSPCA and are roughly 16 months old. Until recently they got on very well with only a few minor squabbles. More recently the neutered Male Guinea Pig has become pretty aggressive towards the female. He now struts around with his hackles constantly raised and try's to pin her to the ground a lot. She doesn't like his new behavior at all and spends most of the time running away from him. Any advice would be greatly appreciated.