Google Jaguarundi.
I believe that may be what you saw. I have also seen one south of San Antonio. Local TP&W biologist denied that they exist in Texas, except on the border. Local game warden, however, said that he and other wardens have seen the cat up close that we saw, and confirmed it to be a jaguarundi. He told me that there have been many sightings across the state, including East Texas. There are several color variations, including black. Medium sized cat, long tail, small feet, small face.
Your local TP&W biologist might be very interested in your pictures. Ours wanted pictures and seemed genuinely interested in confirming their existance throughout the state.
However, they are federally protected. You might not want to officially announce that you have a federally protected species on your property. Texas pond owners would hate to see your land use limited by the feds to taking pictures of and feeding fish to a protected jaguarundi.
