I've seen something like the Paw Spa, though have never used one. They seem like they might work. If it does rain hard, and you try it, let us know how it worked!
Brrr! It's in the 30's so far here tonight. I'd rather that it didn't get much colder! Stay warm!
I'm glad that it helped! :-)
Love All Life, Thank You For Posting! :)