Biped?

When I first started training Tank, I decided he should learn some silly stuff, not just the traditional sit, stay, and rollover. So I taught him how to do something I called "the meerkat". Now whenever he wants something or wants me to know how good he is, he "meerkats"...for several minutes he becomes a biped and he's been doing it so much lately that Spencer and I are starting to worry that he's on two legs more often than he's on all four and this isn't natural for him. It is funny and cute but it just might be a sign of training gone bad.

(I swear he has 4 legs!)