I have never had a problem keeping my snakes and rodents housed in the same room. I've been doing it since I began keeping snakes in 2006. My snakes are no more aggressive and their feeding response is normal. I currently keep 13 snakes, 5 rats, and 5 mice in the same room. No issues. I try not to handle the rodents the same day I handle snakes unless I'm feeding and I always wash my hands between species.