Loki somehow lost a toenail last night (and bled waaay more than I think he should have); I think he may have fallen in his cage. Today he's hardly moving his back legs and seems very unhappy. Nothing is blue/swollen and nothing is broken. I gave him some ibuprofen and moved him to a smaller cage where he won't have to climb for food/water and won't be hastled by his brothers. I'm hoping that this helps, but I'm open to suggestions.