Basically the size of a dog, yes.  And yes, I typically fall into the problem of saying "Giant" when I mean "over grown".<br/><br/>Maybe give them a bit of intellect, too. For instance, maybe they know enough to camouflage a hole they've dug, to hide their nest, or they dig shallow holes (which are also covered up) to trap smaller creatures, to make them easier to eat, or so that they can save them for later?<br/><br/>Scaratank has an awkward sound to it. B-tank sounds better, imo.