They also have the potential to give you one of the gnarlier bites you can receive from a nonvenomous snake if you get a feeding response latch. These aren't constrictors. They rely on strength of body and jaw to overpower their prey. I currently just keep a female mexican indigo(D. m. rubidus) and am still seeking an unrelated male. She's a little over a year old, in the 4 foot range, and really just starting to come into her own. A complete sweetheart to handle but she comes at food fast and with a single minded purpose that's a bit awe inspiring, haha. She also routinely rips the heads off quail and spills the guts of rodents. Fish and snakes, with their scaley protection, hold up the best but I've also seen a video of a black tail cribo literally twisting/ripping the head off a prey snake(smaller cribo if memory serves) in the wild. I'd hate to be on the receiving end of a big adult male's feeding bite.