Our girls tend to get really long nails. We tried to clip them with regular finger nail clippers and it went fine until the very last nail which I accidentally cut too deep and she started to bleed. I felt awful about it but she wasn't at all upset. The nails are long again (they catch all kinds of stuff under them and I think make it hard for them to sit on their perch.) Does anyone have an suggestions? Has anyone tried a nail file? Thanks in advance for the help!