Chompers are giant eggs (the size of an elephant bird's egg, let's say) with beady eyes, a big horizontal "crack" for a mouth, and two tube-like legs, each tipped with a suction cup. They are always hungry, partially because they grow (just enough to notice) every time they fill their bellies and thus can evolve quickly just by eating one large source of food. Because of this hunger, and their raven-level intelligence, and just a tad of magic, Chompers always find villages, and find them an ample source of food.
This is a problem, as Chompers have shells as hard as tooth enamel, can disgorge a bucket's worth of their powerful stomach acid (which can dissolve anything organic in little time; hairs dissolve almost instantly in this acid while a piglet takes two hours to dissolve) at almost any time, and can climb slick surfaces (HA! Glazed walls won't stop me!), eat through wooden doors, and generally cause all sorts of nasty problems. Thus, my question is How Can Medieval Villagers Protect Themselves From Chompers?
Context and Clarification:
By medieval, I mean Europe from the fall of the Western Roman Empire to the Renaissance. This should give you an idea of what the villages will be like.
Chompers are as smart as ravens, which can use tools, and learn to: speak, use a camera to take pictures, and even place listening devices in places where they can A) pick up conversations and B) not be found easily. This means they can learn and adapt reasonably well to human traps and tactics.
Chompers can climb (somewhat)smooth surfaces but not rough ones; they can climb bricks, glass, pottery, hewn stone, and concrete but not craggy tree bark or rough stone; the latter cases don't allow a Chomper's suction cups to grip properly.
Chompers start out with shells as hard as tooth enamel, which grows (thicken and expand outward) and hardens every time they fill to capacity. (Sort of like molting, but without, y'know, the molt.) This means they'll get harder and harder to take down, up until they reach the size of an average pig-at that point, the Chomper tips over, sprouts two new legs, shifts its mouth to the round end of its body, and becomes a Quad (short for Quadruped). Before that, they're a Biped.
Due to magic and natural selection, Chompers are immune to pretty much any hazardous substance peasants can come up with, and the few exceptions they'll be able to sense if it's tainting food left for them. The only exception is alcohol, but Chompers should puke that out before it poisons them, at least that's what I think.
Due to magic, monsters like Chompers "spawn" regularly, so you can't just kill them all and be done. You have to deal with them. Additionally, Chompers can eat Plop, and Plop let them because that's how an even worse monster arises (one outside the scope of this question, but that will show up in a similar question soon).
My question is asking about methods that would A) prevent humans from being swarmed and overwhelmed by hordes of hungry Chompers on the streets and B) would keep Chompers away from children, food, and sleeping individuals. Basically, making life bearable because living among walking eggs that will eat you alive given a chance is kind of stressful.
Same as in the question above, **I'm specifically looking for:**repulsion methods, to keep the Plops away from people; offensive methods, to lower the Plop numbers; and strategic methods to lessen the danger of being attacked or eaten by Plop. These methods should not be magical, as the typical medieval villager (in my setting) does not have access to magic. More specifically, I'm asking how the villagers can make themselves as safe as possible from Plops.
Criteria for Best Answer (Repeat of last question's criteria):
The best answer will include active and passive methods; methods that require human action to work and others that work without interference. I count behavioral patterns as active methods.
The best answer will thoroughly cover multiple viable methods and explain why they'd work.
Said methods should be viable for medieval villagers, something they can actually come up with and produce. That being said, human ingenuity is quite something, so I'm willing to be lenient on this one.
I appreciate your input and feedback, so if there is a problem, please let me know; if you decide to VTC or downvote, please explain why so I can fix the problem. Thank you.