Do bed bugs go after certain blood types?

Bed bugs do not go after certain blood types. Any mammal with blood is an equal opportunity feeding banquet. Yes, that includes your pets, though they probably prefer a less hairy human.

According to the Mayo Clinic, bed bugs need a blood meal to molt and their life cycle includes 5 molts. 5 bites may not seem too bad, however, the bed bug has about 200,000 brothers and sisters that need a meal...that's 1,000,000 bites! The female will lay close to 200,000 eggs per 10 month life cycle, so one can see how easily it can get out of hand.