Not with people, AT ALL, but with dogs. Ok, so my foster, 6 month old pit bull puppy, Luke, has some resource guarding issues with Ophie, my resident 3 1/2-4 month old pit bull puppy, I think. But this happens, when he's in either his crate or the bed in the office. The night we brought him home, he found a bully stick in his crate while he was in there. Anytime Ophie appeared interested in him with his bully stick, he got that classic look on his face that is a, pause, stop, and the eyes got a little wide, then, if we didn't nip it there, he'd growl. Ok, so common sense says, "No bully sticks or chewies left out and about for them because these are obviously high value items to him" But Ophie left a chewie on the bed in the office, and yesterday morning, he grabbed it, and was trotting around the house with it as she ran after him. He did this with toys as well. No snarkiness. But, he is feeling under the weather as his kennel cough has worsened a tad, so he's been crated a lot because being out excites him and gets his cough going. Well, I had him in the office with me this morning, and he was laying on the bed next to me. I had Ophie crated. Well, I felt I had Ophie crated long enough, and I thought I'd see how she'd behave around him because generally she is puppy, puppy, PUPPY! with him and tackles him to play. But she knows he's not well, and lays in front of his crate a lot since he's been ill. She was well behaved, EXCEPT, she was being nosy. And he had the chewy next to him, and I guess she got a little too close, and he snarked at her, and she yelped. I was RIGHT THERE, though, watching to see what he'd do, and he did not bite her. See, I'm confused on how to handle this. Ophie can be annoying puppy, and I've been told to let them work things out for the first couple of weeks. "He'll let her know when he's had enough, and she'll let him know when she's had enough." But I don't know if he snarked at her because he doesn't feel good, or if he has serious guarding issues, or if he's just being a brat himself, or if he was correcting her for being a brat. I don't want to seem stupid, but I haven't dealt with a multi-dog home before.