At a slender 81 minutes, Bad Blood certainly doesn't overstay its welcome, and the above-average creature effects are enough to make this feel like a long-lost installment of Tales From the Crypt.
Tim Reis has spotted the gap in the horror market for batrachian butchery, and filled it admirably. The result is a monstrous hybrid of Frankenstein and frogs, with a mutation of the werewolf myth thrown in for good (menstrual) measure.