Some dogs are just like that. Has she ever returned when called? If so, she might just be testing her limits.
Can you start of somewhere small? I'm assuming from how you phrased it that you have tried this outdoors with the lead on and off. How long is the lead? You can get a retractable leash that is 20 feet plus. Alternatively, if you practice in a yard or somewhere very limited, eventually she will be forced to return to you, out of boredom or luck of the draw. Have you tried practicing indoors with her?
If you have a partner, you can make it more of a game where one of you hides and she has to hunt you down.
You can try using more compelling treats. You can also try walking away from her, and getting low to the ground.
Also, have you tried consistently practicing with her, or do you just call her back when it's time to put the leash on? I practice to Come command probably a dozen times every time we go to a park.
Never scold her for a bad return, even if it took forever. Always praise her.
Finally, try taking her for a nice long walk first so she is not exploding with energy when she gets to an exciting new place that she absolutely must explore.
Good luck! Hope some of this helps. |