There are federal laws that can and do affect the type of animals you keep, under the Fish and Wildlife service, and believe me, with no qualified vet on staff or retainer, they can and do shut down rescue operations if there are not people with the proper veterinary care background capable of treating injured, abused and neglected animals. Texas may have laws through either their Department of Agriculture or their Fish and Game Commission as well.
Be careful what you get yourself into! You really should contact federal, state and local government and ask what permits and credentials you need before you go advertising a rescue.
The Zombie Mama is here!