My 10-week puppy has a lot of drive for a ball on a string, but little interest in going after a towel. How can I get it to go after a towel to work on grip?

Hi Ed

I have just bought your video bite training for pups and I have a question about it. I have just started tying my 10 week old pup up with a milk jug full of marbles above her head and I have also been using the bamboo stick.

Neither of these things phase her. She has awesome nerves and monstrous prey drive, but she will only go after the tennis ball on the string. She will not go after the hand towel. I have used the hand towel to play with her before but she really would rather have the ball instead. She will just sit there with the towel and whine for the ball. And then when I bring out the ball she goes crazy. My problem is that I cannot work on her grip or her counter will the ball. Should I stick with the ball? I am a little confused. Could you please help me out? Thanks a lot.