H everyone, this is my first post here. I've been searching a lot about this and I couldn't find any answers. I hope this forum will be able to help. Last November I rescued and nursed two sparrow nestlings, a male and a female. The male had a few nutrition issues which delayed his feather growth, but besides that I had no other issues with them until now. More or less a week and a half ago I noticed a bruise on the female's left leg and a reddish swelling; I thought she had hurt herself somewhere inside the cage by accident, applied some antiseptic and then waited. When the bruise disappeared I noticed that the two scales that were above it were gone - her skin was completely flat, and then on the next day another very similar bruise appeared on this very same leg (and the swallowing wasn't gone) and another bruise appeared on her right leg, near the "heel". I applied antiseptic again. She hadn't shown any behavioral changes: she is doing the same things in the same way she ever did. What could be the cause of this? Thank you in advance. I've attached pictures I managed to take from the first bruise (which is now gone). The second one appeared just below where this one was.