Hello all! I haven't posted in the new members section yet but I'm pretty worried here. My husband and I adopted a Goldendoodle puppy a little over a month ago and from the start he had a very dominant personality. He's currently four months old. Oddly enough he gets along great with my male Pomeranian who also has a dominant personality and who has little interest in other dogs. But it's a completely different story with our older female Chihuahua mix who is a bit more timid. It started off with him constantly jumping on her and mouthing her neck... I didn't interfere and she did snap and snarl at him a few times but not every time. But regardless of what she did, it didn't stop him at all. He just picks on her a lot. But now its escalating where he has outright attacked her over a toy and now he is starting to snap at her and bite when she walks near him sometimes for no reason I can tell. He does not do any of this to the Pom. He is starting to have issues with resource guarding but we are taking him to puppy classes and are trying to work on it.. We just don't get a lot of one on one in the class which is somewhat frustrating but understandable. We're getting him some puzzle toys and such to try and give him an outlet for his energy and are going to take him to the dog park more. The problem is we take him on walks but he thinks they are utterly boring.. All he does the whole time is try to grab his leash and chew on it or grab sticks then he'll just lay down and chew while we're trying to walk. So if anyone also has any more ideas on how to wear out a pup, please do tell. . I've never had a puppy quite as strong willed as this one and am just worried about the aggression continuing into adulthood. And sorry for the long winded post. Any ideas on what we're doing wrong or suggestions would be greatly appreciated.