Did you ever play that game when you were a kid where the rug/bed/chair/whatever is a haven from danger? Certain death awaited you if you stepped off of it! (By “certain death” I mean, “you’ll fall into the imaginary lava and your brother will make fun of you all day because you lost the game.”)
That’s exactly what is happening to this dog. She needs her toy so badly it causes her to make giant bellowing barks. The pawblem? The toy is a bit out of her reach. The bigger problem? If she removes her back paws from the safety of the rug, she’ll fall into the lava/water/chasm-of-doom or whatever is currently masquerading as a harmless wood floor.