Well, they had a pretty big meal beforehand, and they didn't have the stalks on for very long.
Gotta give them credit for being persistent. It's not like they're flat-out forgetting and doing it again because they don't know anymore. They're being thwarted and trying something different each time.
If i were the anon, i wouldn't kill them just to see them trying to come up with something new each day, it would be pretty entertaining After all, all he need to do is simply thwart off everything they do and that is pretty easy Hell, i would even somehow encourage them to keep trying should they give up ^^