Yes, that looks like he’s being territorial to me. I think avoiding any housecleaning in there while he is inside, just wait for him to be running about (but still stay aware of where he is!), he’ll probably still come running over to see what you are messing up. Even after his neuter, he may still display territorial motions, but shouldn’t be as aggressive looking.

With the charging, I’ve found that Bumpy will do this a) in low lighting, or b) if I reach in or am walking toward him in his blind spot (directly in front of their face), or c) if I move too fast. The first couple times he did that to me was pre-neuter and he did bite. He bit me once when I surprised him placing a plate of veggies (post-neuter). After that incident, I always make sure he understands my hand is coming down into his space. I don’t trust him 100% though, so I usually hold the plate right above where I’d put it down, which then makes him spin in anticipation. I utilize the spin time by placing the plate down as his head begins the turn, and by the time his face is back around to where my hand is, the plate it down and he’s all eyes for the prize! I always talk to him when I’m about to invade his space, so I don’t surprise him.

As far as the biting… I had the same thing with Bumpy, as he constantly was testing me, I’d squeal, he’d pause, then he’d go right back at it. Turning my back did no good, he didn’t mind biting that either. Eventually I quit with the squeals and fell back on old faithful “No” and would use my hand to push him away a few inches. That worked fairly quickly, and it ended up being great because he actually responds to “No” if I see him doing something I don’t want him to do, even from across the room.

Oh one more thing… Bumpy does “charge” us sometimes when we just walk into the room. At first I thought it was aggressive, but now we know it’s his way of saying “HI!!!!” sometimes. He’ll fly out of his pen (it’s open all the time, except when the other 2 are getting floortime), and at full speed run right into our legs. BUMP! then he hops around all happy hoping he’s gonna get a treat.

OHHH 1 more thing!! My flemish baby is 3 1/2 months old now and not too long ago (a week maybe?) she hopped out of her enclosure. 42″ tall. You might want to make sure you cover his pen whenever you aren’t there to supervise!