Posing the tail
In order to pose the tail we will use the Transpose Master plugin. However, to keep the bottle as a reference and unaffected by the ZSpheres rig, a few weird steps will have to be taken.
Make sure the body, eyes and shell subtools are visible and that the bottle is invisible. In the Transpose Master menu (at the Plugin menu) enable ZSphere Rig and press TposeMesh (Fig.48).
A new tool with the "Tpose#1_" prefix will be created with a ZSphere and a transparent version of your model at the lowest subdivision level (Fig.49). Select the original armadillo tool and select the bottle subtool. Select the "Tpose#1_" tool, choose Append and select the bottle. As the bottle is in a different subtool it will not be affected by the ZSphere rig.
Position the ZSphere at the bottom of the armadillo and grow a chain of ZSpheres at the tail (Fig.50). Also create some ZSpheres with the rough volume of the rear legs and some to represent the rough volume of the body. These ZSpheres will keep the body and legs in place while we pose the tail.
In the Tool menu, under Rigging, press Bind Mesh. Move the ZSpheres of the tail to position them around the bottle (Fig.51). When you are satisfied with the position, select the bottle subtool and delete it. Go to Transpose Master and choose Tpose > SubT. The position of the tail and body will be transferred to the original model.