Find information on key laws and resources for people with disabilities who use service animals living in Texas. Texas law and federal law protect your right to have service dogs in public places and service dogs or emotional support animals in housing.At Emotional Support Animals of Texas, I provide renters with an ESA or service dog letter that landlords often will require. Do you live in Houston and need an emotional support letter? Our guide will detail everything you need to know about ESA letters in Texas. You can fly with an emotional support dog or cat as a pet. What you need to fly. I am a Texas State-Licensed Therapist Providing ESA and Service Dog Support Letters for Texas. Clients can enter the dates and cost for your services in the fill-in-the-blank field before providing their electronic signature.