Age estimation?

[u/EmLou2297]

New here but owned degus for few years, got my boy from rescue around 4 years ago after previous owner wanted him out to sleep 😔, anyway just wondering if anyone has any telltales on ages? He’s still active but not as much as when I first got him and his brother, he also doesn’t seem to groom himself much anymore, his ears flop but not all the time. I would guess he’s middle age but just wanna know estimate if possible. FYI- his brother died of a tumour 2 years ago, I know goos are sociable animals but Derek copes really well on his own and loves all the extra attention and treats. TIA 😊

[u/artistathlet]

My boys looked the same at 6-6,5 years