Just a couple of bits on the Marmot geometry that do not look right...
None of the controllers work on his tail, and also I think the right arm controls need looking at, they do not move the same way as the left I think this may be due to how it was mirrored or something.
There are also problems with the legs, we can barely move them without it doing something like this, plus the extra attributes like Toe etc do not seem to work properly and deform the geometry really badly
There are a couple of problems with the arms...
When I select the outer control and rotate it the mesh on the body also deforms badly:
And when I tried the inside one and rotated it, the wrist goes like this: