Please find enclosed two pictures for your attention:
Picture A is a mouse (Mus musculus)
Picture B is a human big toe (mine)
I am providing these as a resource for you to keep. Please feel free to refer to the pictures at any time, in particular the sort of time you feel like putting your claws into something.
For clarity I have labelled the images thus:
A – Acceptable
B – Unacceptable
I hope this helps