I'm the recent owner of some guinea pigs. I adopted them roughly a week ago at the pet shop. They came together and are roughly six months old - both females. They seemed to be getting along fine at first. They both have a pretty big cage (and I did kind of spoil them rotten) and there's plenty hiding spaces. One of them is fluffier than the other, whilst the other is more sleek. Rhona is fluffy and Rosie is not. However, over the past few days they seem to be fighting? Rhona keeps going up behind Rosie and scaring her and they keep making little "rrrr" noises. I'm not sure what to do or if I will need to buy separate cages for them. They seem to not get a long for a minute or so and when I check up on them again they're fine. I'm not sure if this is normal because they're so young or if there's something I need to do to make them feel more comfortable. Thank you!