That actually makes sense
Since they're kinda trapped in a mountain

Wait, does the barrier encompas the whole mountain, or could they just dig out

Probably the whole mountain. But I've always imagined someone getting on top of Lesser Dog's head at the beginning of the Ruins and petting it until they reach the surface

Oh my gosh, what if people used Lesser Dog for a cheap way to space

Poor dog would have its spinal cord destroyed-

I am a dwarf and I'm digging a hole

Diggy diggy hole

Diggy diggy hole

I haven't heard that in years

I don't even know what that is.

Just search "diggy diggy hole"

The song is actually pretty good

Asgore do be mining

O

Google do you mean: Mountain King?

Here in the hall of the mountain king