My dog(4.5 y.o female Canaan dog) is overly gentle with her toys, when we are outside playing, she would many times run all the way up to the toy and than not grab it, and when she does she grabs it so lightly it falls from her mouth, and when she takes it she will willingly drop after a few feet. She definitely has no jaw/ tooth pain since she chews and tears toys at home, and she shows no difficulty when eating her food. She is very hesitant when she chases or tries to catch her toys, and seems very enthusiastic at first but looses the enthusiasm when she gets to the toy, or some times even half way to it! Additionally when there are other dogs around (even those she knows and definitely isn’t scared of) she will instantly give up on chasing the toy, and let the other dog take it (note that I don’t play with her toy when there are unfamiliar dogs around as she can get into fights for it, I use sticks instead but get basically the same result). She is a very athletic and strong dog(though very mildly over weight, already in the process of taking care of it), and we take very good care of her health, but whenever a game involves biting down on something she doesn’t even try(like tug of war for example) . I’m new to dog training but I am very determined to do the best I can for her in all aspects of her life and willing to put any necessary effort to fix this issue, I want her to play confidently and enjoy, but it almost seems like she is constantly holding back.