May 4 month old gp be irritable for any other reason than health issues? Irritable. Keep biting on cage and floor in the house. Tro males living together, this seems to be the dominant one. This is the one that starts the «fridge concert» for cucumber, and is the tamme one. There is no reported friction between them. The biting one is 800 g, the other 900g. This is a stable situation. Eating well. Man sneese form time to time. Diet is lokkes upon in regards of additives, but timotei and ok pellest at least. Dedicated owner, free range mostly. I found som strange colorization on front teeth, and ditt behind them. Te latter also with cage-mate. See pictures. Clean and nice analy. Coprofaging well, no back-pain. Skin-tag behind one ear, and an activly secreeting gland over the tail (clorhexidine and topical steroids? Male hormone-related?). May any of you better experienced people give me a hint if you see anything suspicious? May males behave like this at that age? I know stress can do it. And pain…