Grab your pliers and pipe cleaners... and hot-glue the animatronic tail to the 10 inch base.
Your frame needs to be solid / stiff, which may require doubling-up on pipe cleaners - two or three should be sufficient.
Twist them together, staggering the overlap for maximum strength and rigidity.
Start, by building a loose 'hoop' around the base.
Next, add a sturdy loop on both sides... this is where the hind legs meet the body.
Slap some feet on, and begin adding sculpted horizontal, vertical, and cross-cross pipe cleaners - overlapping at least three or four times!
Continue, until your reach the base of the tail and neck.
Pretty is not the goal here... only strength and general shape!