[ZoeyBo]

I keep catching Zoey like walking with her front paws and she drags her bottom along the floor. I have checked her to see if shes left anything behind, and shes clean and no signs of anything. She went to the vet yesterday.She said Zoey was healthy no worries, although i didnt get to go bc i had to work. My wife took her and forgot to ask.
What is this from? Why would she do this only sometimes?