Hi,
It could easily be water in his nose or an upcoming shed - Unless you see him sit with his head held upright with a slightly open mouth, or see excess mucus in his mouth or smeared on cage furniture, or even in his waterbowl.
If none of those signs are present at the momen then I think it is more a case of keeping an eye on him. Going out of town for a couple of days shouldn't be that big a deal.
dr del
Reply With Quote