My one and a half year old aussie/minpin/sheltie mix will growl at me even to the point of showing her teeth, then will proceed to intensely lick my hand. She will be sitting next to me on the couch and start growling when I pet her so I will stop and she will physically put herself on my lap and nudge my hand up with her nose. Then she will continue to snarl at my hand if I move it anywhere. We adopted her when she was 8 weeks old and has lived with us in the same home with the same surroundings. She didn't start doing this until she was about around 10 months old, and I can't think of anything that would have triggered it. She's incredibly loving otherwise, does have slight food aggression but that has recently come a long way, she now lets us feed her out of our hand and put our hands in her bowl while she is eating. She knows basic commands like sit and stay and will bring the frisbee right back to your feet, she is by no means lacking physical or mental stimulation. I don't know if this is a possessive problem or if any part of her is in pain. Ive tried playing with her paws and mouth a bit and nothing seems to be bothering her. Its almost as if she wants to be pet but doesn't realize my hand is what is doing the petting and is then scared and threatened by my hand. I also thought maybe she just wanted to be left alone so I stopped petting her as much but she is a very cuddly dog and will come up and lay right next to me and even provoke being pet by nudging my hand only to growl at it. Sometimes if I just look over at her she'll growl at me let out a big huff stop growling and rush over and get in my face wanting to be pet. Other times it seems to possibly be voice triggered, ill be petting her and shell be fine until I talk. This next part may just be in my head but I have a fiancé and several friends who have watched me petting her and ask her a series of non sense questions (obviously since she is a dog and will not respond lol) and she'll have no reaction until I ask her "Bertie, are you mad?" then she will let out an intense snarl, Its really pretty bizarre sometimes. I don't know if its the inflection in my voice or if its by chance, I'm just trying to include every possible situation I've dealt with surrounding this topic. I'm hoping someone can provide some insight or has faced a similar situation.