This little fella either wants you to throw his stick or some treats, but I bet either one of them would be welcomed enthusiastically.
Can be either printed in 1 piece or split into top and bottom. Either way I suggest you use support and infill where needed.
Note to myself - don;t be lazy with cleanup next time :-)
modeled in Silo 2, balanced in C4D, Remeshed in Meshmixer, split with netfabb, sliced with slic3r, and printed on a Solidoodle 2 with repetier host
A totally new Doggy model and other designs are now also available on shapeways: