On the squirrel front, my dachshund Lola is a fiend on those guys. She's 12 now, but she's gotten four squirrels, several birds and a rabbit over the years. They are hounds, bred for badgers, and she hates squirrels with a passion.
Side story, when we were having new siding/windows on the Kennesaw house a few years ago we had a a hole gnawed in the facia and squirrels were in the attic. They were replacing all siding/facia with hardieboard, but I had to clear the squirrels. My attic space isn't large, and the HVAC is centered in the attic, so I had decent shooting lines. Took my 9MM with bird/snakeshot, and over two afternoons took out the three resident rodents in the attic. I was concerned that a neighbor might summon the gendarmes over the gunfire (it was quite loud from where I stood), but it was the cheapest critter removal option. When I tell people I discharged my 9 in the attic, I get looks until I say it was birdshot.
So, on the squirrel count, Lola 4, Tim 3.