Maryland only protects dog owners from denials of coverage here. Nothing in the law would stop an insurance company from charging higher premiums. The assumption that your dog will only cost you if he/she bites someone is no longer the case. You could have the friendliest Pit Bull or German Shepard in the world. But your insurance company could hike your premiums because your dog is a blacklisted breed. It’s also a little disconcerting that the doggie blacklist includes mixed-breeds of any of the listed dogs. If you have a dog that is 99% lab and 1% German Shepard, the insurance company could still charge you more.