Personally, Tom is probably a British purebred short-haired cat, which is what we often call a blue cat, but Tom is blue and white. First of all, its coat color is a typical English short-haired cat, with a blue-gray body and a white mouth. Another thing is that Tom's eyes are yellow. But some people think that Tom is a Russian blue cat, because Tom is slender in the play, and the English short-haired cat is still a little fat for Tom's image. Coupled with the relationship between the United States and the Soviet Union at that time, it is also possible to portray a Russian blue cat as a stupid Tom.