When Athena gets too close, Lexi growls menacingly at her. Like most terriers, Lexi has no idea how small she really is. She'll take on any dog that is looking for a fight.
Athena starts to circle Lexi, looking for an opening that will allow her to grab the bone.
Lexi never takes her eye off of Athena while she is being circled by the larger dog.
But when Athena leaves without the bone, Lexi appears to grin in diabolical delight. She won!
Now why do people say that dog's emotions are so very different from human emotions? In Lexi's case, anyway, that doesn't seem to be the case at all!