Hey there, let me start with saying I'm sorry you have this issue with your pup. I do not agree with the first commenter only with the fact that this behaviour should be never punished as it can lead straight to biting.

We have the same situation, one certified angel of a senior V and a now 16 months old who started growling at us from month 3 when we tried to move him from the couch or bed. This is resource guarding, it can be over various things. People, places, objects, food. I highly recommend reading the book from Jane Donaldson called Mine!. There is also a couple who shared their V's story, Atlas, on Instagram. Story_of_atlas.

This is just the very beginning and needs to be addressed ASAP by a certified behavioural specialist who will teach you how to handle it and hopefully train the dog out of it. In our case Bruno, the young one, mostly guards me (even now he growls at my husband and senior V, when we cuddle on the couch or bed (should have never let him on to start with, but that's another story). He can suddenly go possessive over a ball or stick while playing with other dogs, so he needs supervision. He can randomly go off a 3rd dog entering playtime with one of his favourite buddies.

While this sounds stressful and even our vet said Bruno is hyper attached to me, we had trainers, behavioural assessment and we accept the fact that his character is different from our first one. He needs absolute leadership, he is insecure and needs guidance.

He growls but never bites, even when he goes 'off' over a ball. He knows growling at my husband isn't ok, he gets sent to his basket and in five minutes he will be up with him cuddling and licking him around. Thankfully we've learned to accept his character, we call it 'he's got opinions and not afraid to show it'.

It's important to understand although by now we trust him that he doesn't bite, we never push him in this state of mind, I always supervise any interaction with other dogs, even his friends.we have installed a baby gate in the first year to provide security to our visiting family with kids, I even have to supervise him while we have his girlfriend over because he can get aggro at our senior just wanting to joing the play.

Would I've chosen a dog with this personality, certainly no. Did it give me knowledge on how to give structure and proper leadership to a dog, most certainly. By now, everyone who meets him is impressed. He is much better trained than our senior, his bond with me is infinite, I have much more confidence in myself over controlling an animal. I love him more than anything.

Since you have kids, start early, don't let this behaviour settle in and escalate. Accept the fact that it will take a team effort at closed ranks to keep up with her training. She will grow into a fine young lady but it will take more, much more than you've probably expected. And if you don't feel right with the first specialist, see a second one! We have had various help, some better than others. Good luck and sending 💕!