Texas law would require restaurants to permit service dogs to enter

San Antonio Express-News:

A bill that ensures food establishments cannot deny entrance to a service canine, including dogs assisting people with post-traumatic stress disorder, is en route to Gov. Rick Perry for approval.

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The proposal amends the state's Health and Safety Code to ensure that service canines can accompany people who are blind, deaf, in a wheelchair, or have a seizure disorder, a mental illness or PTSD. If the person's disability is not apparent, employees may ask only “whether the assistance animal was required because the person had a disability, and what type of work the animal was trained to perform.”

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These dogs can be critical to people's functioning.  As long as they don't constitute a threat to others, I see no reason not to let them enter.  They have literally been life savers for many people.