Hi. I am new to owning guinea pigs. My daughter rec'd 1 (Scooby) for Christmas. After researching on line, we decided to get a buddy (since everything seemed to say they get lonely. So now we also have Rocco. We kept them in separate cages for 3 weeks and let them interact with each other in their free range time. I finally put them in the same cage today. Now Scooby is grinding his teeth. He has not been eating his hay for the last week or 2 so I am not sure if he is grinding them because he is sharing his home now, or if it is due to not eating the hay. I have kept chew treats in his cage at all times. I also give him carrots on an almost daily basis (I thought these helped grind their teeth down). I really need some advice if anyone can offer it. Should I try to look at his teeth? If so, how can I do that? Should I just take him to the vet?