So my male guinea pig (4 years) had a Vitamin-C deficiency. He was tired and one of his teeth broke completely, while the other chipped a bit. With the doctor's advice, we started him on a dosage. This was around 1.5 months back. He got better. More energetic. The chipped tooth grew back, but the one which completely broken has just grown a bit. Around 2 days ago, he seems to be more lethargic once again. He's just lying about, zero interest in anything. He's eating and all, but mostly he's just lying down. Should I increase his dosage of Vit-C?