Found an interesting article on Jefferson’s thoughts on dogs. In a letter to fellow land owner Peter Minor, Jefferson writes,
“I participate in all your hostility to dogs, and would readily join in any plan for exterminating the whole race. I consider them as the most afflicting of all the follies for which men tax themselves. but as total extirpation cannot be hoped for, let it be partial.”
The article does go to state that despite his strong words, Jefferson kept working sheep dogs (presumably at Monticello) and wasn’t averse to giving away their puppies either.
Go here for the source http://www.monticello.org/papers/featured.html