How a cow learns to use tools without being taught

HostI was watching this clip of a cow in a field the other day. Most of the herd was just standing around, but this one cow walked right up to a heavy gate, looked at the latch for a second, and just flipped it open with her nose. No one showed her how to do it. She just seemed to know. How does a brain we usually associate with just munching grass turn into the brain of a little engineer?

GuestIt's easy to think of cows as these slow moving lawnmowers that don't have much going on behind the eyes. But they're actually very deep observers of how the world works. When a cow wants something, like a fresh patch of grass or a good scratch on her back, she starts a process of poking and prodding. It's not like a school lesson. It's more like a puzzle they can't stop messing with. They use their mouths and noses the way we use our hands. Since they spend so much time just standing and watching, they pick up on the way things move. They notice when a person jiggles a handle or when a fence post wobbles. They're building a map in their heads of what leads to what.

HostBut she doesn't have fingers or thumbs. To me, using a tool usually means picking something up and using it to fix a problem. A cow just has a big wet nose and a very long tongue.

GuestWe have to broaden what we think of as a tool. If a cow finds a sturdy branch and uses it to reach a spot on her neck she can't lick, she's using a tool. If she learns that pressing a specific button on a water tank makes the flow start, she's using an object to change her world. Scientists often call this physical reasoning. It's the ability to look at a lever or a latch and understand that if I push this part here, that part over there will move. They do this by using their bodies as a kind of probe. A cow might spend twenty minutes just licking a new lock on a gate. She's feeling the edges and sensing how much it gives when she applies weight. She's not just playing. She's testing the mechanics of the object.

HostI'm not sure I really believe they're thinking it through like that. Isn't it just as likely she got lucky? She bumps the gate a hundred times and once it happens to pop open, so she just repeats that motion?

GuestIt can look like a lucky accident at first, but there's a big clue that tells us something more is happening. Researchers have actually tracked the heart rates of cows when they solve a problem like this. When a cow finally figures out how to open a door to get to some food, her heart rate jumps and she gets a big burst of energy. Some cows even do a little hop or run around in a circle. It's a literal eureka moment. If it were just a random accident, you wouldn't see that emotional spike. She knows she's the one who made the gate move. She gets a rush from the success of her own brain. They have even found that cows would rather work for a treat by solving a puzzle than just have the treat handed to them for free. They value the win.

HostIf they're this smart and they love the win so much, why don't we see them doing it more often? Most cows I see are just standing in the rain looking pretty bored. They don't seem like they're trying to invent anything.

GuestTheir lives are usually very predictable. In a standard field, there aren't many problems that need solving. But when you change their environment or give them something new to play with, like an automatic brush machine, they go into high gear. They'll actually stand there and watch another cow use the brush first. They study the timing. They see exactly where the other cow leans to make the motor start spinning. This is a huge part of how they learn without a teacher. They're not just lone inventors. They're part of a community of observers. They pick up tips by watching the mistakes and successes of their friends.

HostBut that brings us back to being taught. If they're just copying what they see, they aren't really figuring it out on their own, are they?

GuestCopying is actually much harder than it looks. To copy someone, you have to understand that their body is like your body and their goal is like your goal. But even without another cow to watch, they're incredibly persistent. They have a very long memory for these things. If a cow figures out how to navigate a complex path to get a snack, she can do it again perfectly a year later. They hold onto that data. They're constantly looking for the weakest link in a fence or the easiest way to get what they want. They don't need a teacher because the world itself is the teacher. Every time they nudge a gate and it creaks, they're getting a little more information for their map.

HostSo it's less about a sudden flash of genius and more about just being very stubborn with their faces.

GuestThe stubbornness is what gets them there, but the brain is what keeps the answer. The most striking thing is that they don't just do this for food. They'll use tools and machines just to make their lives more comfortable. A cow will figure out the exact angle she needs to tilt her head to trigger a grooming machine just because she likes the sensation. She has hacked a piece of machinery to improve her day. It shows a level of self awareness that we usually only expect from animals like chimps or crows. They know what they want, and they know the world is something they can change to get it.

HostThe next time I see a cow staring at me over a fence, I'll assume she's just figuring out which pocket I keep my keys in.

GuestShe's likely waiting for you to turn your back so she can see exactly how that silver latch on the gate clicks into place.

HostThat farm gate isn't just a barrier anymore, it's the final exam.