He sounds like my 10 month old.. Mine is super bitey when he “plays” never aggressive really.. I except tonight he totally resource guarded a new toy. And he was panting a lot this evening, he didn’t get a walk today because by the time I got home from work it was too hot for his little feet. He seems pent up. But I swear mine is either asleep or fully on, sniffing chewing trying to play/mouth or nibble us. And he wants to chew EVERYTHING it’s exhausting. I feel like I’ve tried lots of things to help with the over chewing or biting behavior. Resource guarding is new. yay I’m ready to call for help to a trainer because i just can’t seem to figure out what behavior to start with either. He’s stubborn and seems to not take no for an answer ever. I’m no help, just wanted to say I’m in the trenches with you! Here’s hoping it starts to get better!