Well, her profile says she’s from Cambridge MA, and she is six years old, so she must have seen snow before (in 2014 there was 14 FEET of it), but it is possible that, as a city dog she never got to “romp” in it.
Or maybe she forgot what it was like!
Even city dogs have to “go” so she must have at least been in snow sometimes. But maybe, like you said, they didn’t let her play in it.
Or maybe she’s one of those dogs who simply loves snow. LOL