The bulldog is the very same character figure in Stooge for a Mouse (1950) cartoon & its rarely known name is Mike. Because Sylvester called Mike's name just one time, shortly after chasing the unnamed mouse back into its mouse-hole as it was trying to get to the table of cheese.
Hippety looks more like an actual kangaroo here. In later cartoons, he would become more of a caricature. And although kangaroos are marsupials, not rodents, their faces do resemble those of a mouse, just a bit.
The kitchen sports several mid century styled modern appliances, such as an electric mixer and a new style sink, yet still has an old fashioned wood burning stove.