Re: Feeding a cowplant only satisfies hunger if the "cake" is visible.

Okay, with further testing I'm not 100% sure my initial observations hold.  I still think they're getting too hungry too fast! and faster than they used to! and did have a cowplant stick out its tongue IMMEDIATELY after I fed it without the tongue visible, but... it instead seems to be completely random where instead before I thought there was more of a pattern.  So I'm going to mark this as the solution (such as it is).

(Basically:  Feeding not topping off hunger is probably a bug.  Changing the rate of hunger decay to possibly be an RNG rate is probably an intentional development choice.)