teeth will need checking regularly,weight him daily,ensure he is eating enough.typically pellets and hay are often the first food groups to stop,if having dental problems.I had a dental piggie last year, 1st vet wanted to put Jerry to sleep !He had a dental abcess,Jerry was seen in northampton,and had antibiotics for the abcess,molars were filed.he went every two weeks for a month,every 6 weeks there after for four months,when Jerry commenced eating on his own.I cannot stress how important it is to go to a vet thats is savvy with guinea pig teethHope your boy teeth wear evenly.