Hi I'm new and have a beautiful Brindle boxer, Gracie. We have had boxers before so the breed isn't new to us. I have read all the post on biting, but Gracie is extremely stubborn and nothing is working very well. She's even in puppy kindergarten and trains well (sits, stays, and touch), has every toy you can imagine, gets regular walks, but the moment you aren't training or walking she's biting. I have tried bitter apple and now she barks at it and comes back for another nibble. I have put her in time out (not her crate) or I have left the room. I have never had a boxer sooooo stubborn. Is there anything other advise out there?
Pic coming soon
Pic coming soon