Hey MWW, it's been so long. Sorry to hear about Serena. I'm with the others. If you caught it really quick and cleaned her feet well, like 14+ suggested a bit of milk maybe and watch her closely. It wouldn't hurt to call the vet to see if you should be looking for anything special or doing anything special. They shouldn't push you to bring her in if nothing obvious is going on. Poor kitty and poor mom. Hugs to you my friend, will try calling soon.