3 months after purchasing a male piggy from the pet store, I decided to get a friend for him. I was advised to find another male piggy a little older than the one we had. So we got a male guinea pig that needed rehoming, and kept the 2 in separate cages next to each other for a week. We followed all the guidelines regarding introducing the pigs, but after an hour in neutral territory, though no blood was drawn, they still both seemed pretty aggressive. We returned them to their separate cages, and wears feeling discouraged after the initial introduction. Should we try another introduction? If yes, how many more attempts before we accept that they may need to remain separated?