My 3-month-old puppy bites me aggressively, causing bruises. Help!
That is a lot going on and it sounds like Oggy would benefit from a visit with a trainer or veterinary behaviorist in your area, especially if she is being aggressive to the point of bruising or drawing blood. Aggression usually looks very different from play/exploration biting and can include low growling, stiff bodies, showing the whites of the eyes, hair raising on the back, baring teeth, and then nipping or biting. This is unusual in a puppy of this age, so if it is happening, it is best to seek professional help in person ASAP since it is a complex issue that needs to be worked with.
If the nipping is just puppy nipping, and she is also chewing on lots of things, it could just be normal puppy behavior and a puppy kindergarten/training classes is a great way to establish some ground rules and get used to interacting with each other in a positive manner. I'm also including some articles on general puppy nipping/chewing that may help as well.
https://www.petcoach.co/article/puppy-biting-nipping-of-hands/
https://www.petcoach.co/article/puppy-biting-when-does-it-stop/
https://www.petcoach.co/article/chewing-in-puppies-how-to-control-it/
https://www.petcoach.co/article/6-tips-to-help-prevent-destructive-chewing/
https://www.petcoach.co/article/how-to-choose-a-dog-trainer/
Updated on September 23rd, 2025