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 she is dealing with pain. I noticed swelling on one side of her head a few weeks ago and now there is a bump forward of her ear about the size of half a boiled egg. I was hoping someone on this forum may have had some experience with something like this. I thought she may have had food impaction but I don't think that is it. Maybe an infection of some kind? I welcome any thoughts and advice.