It's a Chinese hamster (also know as dwarf hamster) that either stored food in it's mouth or is kinda fat. A very cute pet but daaaamn do they bite. Had one of these little balls of fur stuck to my finger for about 30 seconds when I was cleaning it's cage because I mistakenly woke him up.
I think he's basing what he's saying off the fact that for certain movements, they used a cat as reference. Like, in the Gift of the Night Fury, when Toothless gets his new tail, they just stuck a piece of paper to a cat's tail and based it off of that.
A panther isn't exactly easy to use as a reference point for certain movements.
I doubt any will believe me, but I know that cat in the last gif.
His name is Reggie and he lives with the people I got my terriers from and he is the chillest cat you will ever meet (as you can tell as he is mobbed by puppies). He secretly loves it though or else he wouldn't put up with it so much. They've tried removing him from the puppy mosh pit, but he will always go back for more.
i saw your gif while listening to "too many dicks on the dance floor" by flight of the concords. if you have the chance to listen to it, i think you may have yourself a laugh.