I adopted two guinea pigs about 2 weeks ago. The bigger one would intimidate the smaller one every once in a while. Last night and this morning (it's 4:30 a.m.) and they are still going at it, I took the smaller one out (Oreo) and held him for quite awhile till the larger one (Max) calmed down. Then I sat with Max for a while. As soon as they got back together, Max would jump on Oreo's back and not let him move. I turned out all the lights except for this light on my desk, and put a cover over the cage. Seems to have quieted down, but I'm afraid it will start up again. Any suggestions, and is this normal?