Today, while I was cutting the nails of my two year old girl. I noticed that the tips of her ears had this weird black crust, at first I thought it was dried food, but it was her ear!! Its looks almost like it has been burnt but that's absolutely impossible because i never let her out of my sight when she's out of the cage and this can't be an old injury because I would have noticed. Its on both ears, and while I cut her nails, one of the ends must have fallen off, cause the tip of her ear looks cropped now, and there's a raw, bright red line where that crusted piece was connected.
I'm really worried.
Any ideas on what this could be? And what to do?