Mouse Rigging Progress

Below is an image of the mouse, as it currently stands. I have added 2 IK handles so far, one on each arm. I still need to add more IK tools around the body, including the legs, head and eyes, but I am currently trying to sort out the deformation of the body, when the arms are moved for animation. The image also shows the control points that I have added for each IK handle, to aid the selection of each IK handle during animaiton. I have also colour coded each control point.