bump

Over the last few months I've noticed this deer having problems chewing the small horse treats I throw to her. Instead of just picking them up and munching she usually tries to crunch them up on the ground and when she does pick one up she seems to writhe her head around a bit which seems like...

What would you guys think this bump under his ear is?

Gotta make this quick...gotta head to work... One of the doe fawns I raised has a lump on its snout and I'm wondering if this is a common issue/injury and if I should treat it with anything? It basically looks like a goose egg we'd get if we smacked our head on something...just a small...