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Sinophoneus, primitive anteosaurid from Middle Permian of China. Skull lenght 35 cm.
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According to M.F. Ivakhnenko - yes. Recently has been published (in Russian) analysis of food chains in Ustie Strelna locality - they found that gorgonopsids dependent from aquatic tetrapods and fish.
It's a very little-known fact, but Sinophoneus used to be kept as favored pets by the rulers of the Xia and Shang Dynasties, until one Shang king thought that they would be better at being dinner than lapbeasts.