Ever since the puppy and my 12 year old beagle(peanut) have become buddies, Peanut has been displaying puppy like behavior. For instance a few seconds ago she was tearing up a piece of paper right now she's tossing around a shirt playing with a squeaky toy, she never did that even when she was 1 (that's when I first got her). Is she reverting back to puppyhood ? I've never seen her rough house this much with another dog either is she just happy and feeling frisky maybe? It's funny though because she can also get very defensive at times with him (I would too if I were her), when she's resting and he wants to play she'll jump at him growling looking very mad, should I keep her from going at him or let her sort things out? I'm thinking let her put him in his place, my family always breaks it up because they think he'll get hurt but if he learns to respect her and back off when she says there won't be as much of a problem, he also doesn't get agressive dog body language. Am I being ridiculous for wanting to let the beagle set him in his place? I have a feeling that if she doesn't do it when he's young he's going to cause problems between them by being obnoxious. Just now he was rolling around growling wanting to play, she didn't want to so she let a deep growl out and he didn't ag it on as much (to her still being annoying) but still I think she doesn't need to be held back.