I don't think she was a full corgi (you almost never see all-white corgis, and not quite the right head/body shape) but she definitely had some corgi in there, or a similar herding breed. There's no way Strelka was a full corgi, either (although the idea of stray corgis running around Soviet Moscow is awesome, lol) but she also had a very expressive, corgi-ish face!