I got two new guinea pigs about three weeks ago, and a week and a half ago I took my two guinea pigs to the vet. They were both suffering from lack of vitamin C, and the Mother (who gave birth about two months ago) had a bacterial infection. The vet gave me vitamin C supplements and antibiotics to use, and I have since used daily. However, I recently noticed that the mother has begun to click her teeth. At first I thought she might be irritated at me for picking her up to do the meds and weigh her every day, except she does not click when I am holding her or petting her, nor when she is interacting with her cage mate (1 of her 2 month old daughters.) Usually when I notice her clicking it's when she seems to be begging for food.