Whew. We ended up at the vet again today and Katy had an accident while I was putting her into her kennel. I thought I was going to have to do some creative cleaning when I got home, but I decided to take a chance and I found out today that Cold Spot Grooming is AWESOME.
I stooped there hoping they might do cat grooming (it turns out Petco does not) and they were able to squeeze us in immediately, very fortunate for me and Katy since they are booked out a week in advance.
The groomer, Monica, was AMAZING. She was able to clean up Katy without further traumatizing her and did some trimming to help ensure she stay clean for a little while longer while she is still on the mend.