A couple of weeks ago, I noticed a red mark on Monty's foot. It looked a bit red but there was no visible open wound. I put it down to the rough perch that we had been trying out for her nails. I removed the pumice perch as soon as I saw her foot ( it went straight into the bin) and replaced her cage sand papery lining with plain smooth paper. I kept an eye on her feet and everything seemed to be clearing up. I noticed the mark had turned brown this morning. Is it just her feet healing or is it something more serious?