How old is she? Why type of collar are you using? With very young puppies, I try to make it fun. I do things to encourage them forward such as using a high happy voice or even luring with a small treat. Gunner wasn't very good on a leash when I first got him, but I didn't pull. I just made it as positive as possible and soon he was awesome at walking on a leash. We also go lots of fun places on the leash so he associates it with good things. Of course, according to your pup's age and where she is with her vaccines, I would be careful about going out in public. Try not to force her forward...instead make her WANT to go forward with praise, a toy, or treats. Wearing a leash and collar is a weird sensation so they can take a little bit to get used to it 