Welcome to Houston! Couple things that might help you. Not sure where you're located but Ultimate Reptiles in Hockley is an awesome reptile specialty store. Eric Haug, the owner, has been at it since 1973. As for rat breeders, I don't know of any in Houston but Pet Snake Snacks has been at every reptile show I've been to in Texas and I've bought from them on multiple occassions without issues. Big Cheese in Dallas is good and the shipping isn't as bad since it's in state. As for shows, I know there is the Repticon coming to Pasadena (not far at all) on 7/31-8/1 but this one is new so I can't say how good/bad it will be. The annual one put on by the East Texas Herp Society is always worth going to and this year it is 9/26 (there is actually a weekend conference but the expo is on the last day). Their site is www.eths.org. The NARBC is also doing their first Houston show on Halloween weekend. That's it for Houston shows I know of but of course San Antonio and Austin both have multiple shows a year and are within a 3 hour drive if you're up for a road trip. Hope that helps.