The Primos "Frantic Fawn" is pretty good. Comes with a baseball sized device that takes 2 AA batteries and gyrates, making it quiver on the stand. I use some high quality rechargeables and get 2-3 hours on medium, which is the most natural looking setting. On high it really wobbles and looks funny. The body deflates and the metal stand breaks down so the whole thing packs down pretty small. DVOR has them on sale now for $35 which is cheap. I just ordered the Rabbit from them on Monday but looks like they are sold out today.
I wish it were a little bigger because by mid August the fawns are much bigger than this, and it would be easier for the bear to pick out in the thick stuff.
Called in a bear last September and though he was responding to the call, the fawn kept his attention once he came in.