Not a big deal at all, it's almost impossible to prevent a nip here and there. I have a boy with a nipped back foot, as I was throwing feeders in every corner of the bin, I watch him run by another dragon going after a dubia and his foot went right in the others mouth. It wasn't even a bad bite, but beardies are extremely sensitive to loss of blood flow and it looks like he may lose most of it. Most toe and tail nips happen when babies are very tiny and their extremeties are super small, so you can understand how easy it would be to lose a toe or tail tip that is 1mm wide!