The conservative group Alliance For Truth and Joe The Plumber for this:
A conservative group in Missouri is picking up the backing of the Tea Party and Joe The Plumber in its quest to stop the Humane Society and other animal rights groups from passing "radical" anti-puppy mill legislation.
The measure, which can be read in full here, is called Proposition B or the "Puppy Mill Cruelty Prevention Act." It aims to help eliminate the "3000 puppy mills" in Missouri that constitute "30% of all puppy mills in the U.S.," according to Michael Markarian, the Chief Operating Officer of the Humane Society.
I think the far-right is so against abortion because vigorously defending fetuses is their idea of penance for all of the truly awful, awful, horrible, wicked things they support. Like this thing. I mean, they're seriously defending puppy mills? Puppy mills?!