
hes just been bossy ,demanding the ball off you, have a few behaviours introduced so he can do "them" for the ball instead if the nipping.
Teach,for Eg , A twist, bow, Walk back, beg, roll over.
Then once youve taught, start using the ball for reward. Ie i say to mine, "Can...? You?...do a???? BOW?" *dog does Bow & gets Ball)
Then this can build up to you asking, "what CAN...YOU...DO...?" dog offers a bow/twist whatever, "what a fabulous TWIST" throw ball
Then you can add "what else can you do?".
This should make him think more about himself & his actions rather than him being demanding of you!.
You will need to teach him a few behavoiurs first though, at least 3