Poor thing. I hope the foot gets better!
Gordy has occasionally sprained an ankle or shoulder or cut a pad, but I think it's because he's 3 and has lots of energy and runs around like he's possessed.
If he needs a little extra traction while waiting for an injured foot to heal, I put a baby sock (the kind with grippy things on the bottom) on the injured foot and secure it with fabric tape around the ankle. This usually comes off if it's raining, though, so still working on a solution for that problem!
If the injury is higher up on his leg, then booties work pretty well to give him extra traction.
2014 Bobbin Bramble / Brooks B67
2008 Rodriguez Rainier Mirage / Terry Butterfly Tri Gel
2007 Dahon Speed Pro TT / Biologic Velvet