Allergy to pine shavings? Small crust at corners of eye.

I very recently was at the vet with my other chin, however they both were examined and she made no mention on his eyes. It is just a very small crust in the front corner of his eyes, similar to when humans wake up with "sleep" in our eyes. There are no other symptoms, his fur surrounding his eyes is not wet. It does not worsen at all or change.



This is why I'm wondering if he has allergies to his bedding. He had fleece prior to when I adopted them, but Alena told me pine shavings are good for the type of cage I have.



Thoughts? His teeth are great. Eats and drinks regularly. Wonderful large poop, active, no changes at all. Any help much much appreciated :)