Why Do We Drink Cow Milk But Not Pig Milk? The Answer Isn't 'Gross'

Content Idea & Rationale:

  • Content Idea Title/Theme: "Why We Drink Cow's Milk (But Not Pig or Dog Milk): The Surprising Truth"

  • Rationale for Virality: This question taps into a natural curiosity. Most people drink cow's milk without ever wondering why it's the go-to choice, especially when other mammals like pigs are also commonly farmed. At first, you might think, "Ew, pig milk," but there's a genuine interest in understanding the real reasons behind this preference. The question takes a familiar concept—milk and common farm animals—and adds an unexpected twist, instantly grabbing attention.

  • Content Angle/Explanation: A video or article can delve into several key factors:

    1. Anatomy & Physiology: Cows (and goats, sheep) have udders that are relatively easy to milk by hand or machine and are designed for significant milk storage. Pigs, on the other hand, have many small teats (10-14) that are harder to access, and sows are protective and often lie down to nurse, making milking difficult. Dogs also have multiple teats and produce milk tailored for rapidly growing pups, not in large volumes.
    2. Milk Volume & Composition: Cows have been selectively bred for thousands of years to produce vast quantities of milk, far more than their calves need. Pigs produce much less milk, and it's very rich, designed for piglets that need to grow quickly. The taste and composition might not be as palatable or versatile for human consumption on a large scale.
    3. Temperament & Husbandry: Cows are generally docile and can be herded and managed for milking relatively easily. Sows can be more aggressive, especially when nursing, and are not built for standing patiently to be milked. The entire infrastructure and process of farming pigs is geared towards meat production.
    4. Economic Viability: The combination of high yield, ease of milking, and docile temperament makes cow milk production far more economically efficient than attempting to establish a pig or dog milk industry.
    5. Cultural & Historical Factors: Cultures that domesticated cows, goats, sheep, camels, etc., developed traditions around consuming their milk. Pigs were primarily valued for meat.
  • Why it's good content: It's highly educational while being quirky and slightly taboo (the thought of pig or dog milk). It debunks the simple "it's just gross" idea with factual, interesting information spanning biology, agriculture, and history. This makes it very shareable as a "TIL" (Today I Learned) piece.

Target Audience:

  • General Curiosity Audience: Anyone who enjoys "ELI5" (Explain Like I'm 5) type content, learning interesting facts about everyday things, or has a passing interest in food science, agriculture, or animal biology.
  • Foodies & Agricultural Enthusiasts: People interested in the origins of their food and the practicalities of farming.
  • Social Media Users: The quirky nature of the question makes it perfect for sharing on platforms where intriguing or "weird" facts perform well.

Origin Reddit Post

r/nostupidquestions

If humans can drink cow’s milk, why can’t we drink other animals’ milk too? Like pig milk or even dog milk? Is it just gross or is there a real reason??

Posted by u/CherryJade7706/08/2025
I was thinking about it while grocery shopping and now I can’t stop wondering. We’re fine with goat and cow milk, but imagine asking for “oat, almond, or pig milk” at Starbucks. Is it just so

Top Comments

u/call_ur_mom
Negative results are super important to science. Your friend is a rock star.
u/Quirky-Reputation-89
A lot of this is a result of breeding. We have the technology. Breed a milk giraffe.
u/Psychogistt
You can milk anything with nipples
u/LtPowers
Yes. I don't think you'll find many lactating people saying they *enjoy* pumping.
u/Commercial-Hour-2417
But why not pig milk?
u/DazB1ane
Isn’t that essentially what human breast pumping is?
u/JKmelda
Having worked with pigs and goats and having milked cows as my first job, I cannot fathom trying to milk a pig. They just don’t have the personality for it and the amount of effort you would
u/[deleted]
[removed]
u/Kindly-Discipline-53
I haven't seen anyone else mention udders but I looked up [Udder on Wikipedia ](https://en.wikipedia.org/wiki/Udder)and that does seem to be the deciding factor. >An **udder** is an [orga
u/Datonecatladyukno
What a terrible day to have eyes
u/Psychogistt
You can milk anything with nipples
u/Kindly-Discipline-53
I haven't seen anyone else mention udders but I looked up [Udder on Wikipedia ](https://en.wikipedia.org/wiki/Udder)and that does seem to be the deciding factor. >An **udder** is an [orga
u/Nogero37
I’ve got nipples. Can you milk me?
u/SaintsNoah14
Yeah but without mechanical suction and air-tight seals for most of human history, we didn't breed udderless animals for milk production nor develop a culture of consuming their milk.
u/Emergency_Ask_9697
Yes he could. He, and anyone really, can milk anything with nipples with enough perseverance. Just because we can do something, doesn’t mean we should
u/chrispybobispy
I have nipples can you milk me?
u/SmartForARat
Bro, people have drank pig milk and goat milk and all other kinds of milk. The reason cows are preferred is because we've selectively bred them for thousands of years to produce copious a
u/Quirky-Reputation-89
A lot of this is a result of breeding. We have the technology. Breed a milk giraffe.
u/NUGFLUFF
I have nipples, u/Motorspuppyfrog, could you milk me?
u/darkwyng7986
1) I think cows and goats produce more volume of milk than other animals - efficient production plays a role in choosing cows and goats for the most part for milk 2) We also drink human milk
u/UnfortunateSyzygy
I worked with a girl who had to milk pigs as part of her master's dissertation in veterinary science. It's apparently kinda hard to do and they don't produce a ton like cows or goats do. Th
u/english_major
Many years ago, I worked in an agricultural research station. We got 35 litres of milk out of each cow every day. It might be even more now.
u/DebutsPal
It's just really hard to milk a dog
u/meow4352
“I have nipples, Greg. Can you milk me?” Thanks for the laugh! Edited to add y’all this is from the movie “[meet the parents](https://youtu.be/bXNwzKo5Yps?si=zQHlNAC3grnSu86t)” please no mo
u/SmartForARat
Bro, people have drank pig milk and goat milk and all other kinds of milk. The reason cows are preferred is because we've selectively bred them for thousands of years to produce copious a
u/JKmelda
Having worked with pigs and goats and having milked cows as my first job, I cannot fathom trying to milk a pig. They just don’t have the personality for it and the amount of effort you would
u/LtPowers
> They like it. To the extent that it relieves the uncomfortable pressure in their udders, I suppose that's true.
u/therapewpew
you mentioned all the animals that we milk, but no one mentioned udders! I think horses and donkeys are the only exceptions? udders are p much the reason we selectively breed and milk those
u/Careful_Farmer_2879
Cows will literally walk up to an automatic milking carousel and get on it. Not making that up. They like it.
u/hotel2oscar
We bred cows for milk and pigs for meat. And pigs are ornery and not exactly as open to the idea of sharing their milk as a cow apparently.
u/Buford12
Humans can drink any mammals milk. We use cows milk, sheep milk, goat milk, horse milk, and camel milk, buffalo milk, yak milk, reindeer milk, and donkey milk. [https://en.wikipedia.org/wiki/
u/sexrockandroll
Probably the time/cost of harvesting it is a big barrier. Cows are docile and huge and make a lot of milk.
u/MornGreycastle
Nothing wrong with dog's milk. Full of goodness, full of vitamins, full of marrowbone jelly. Lasts longer than any other type of milk, dog's milk.
u/hotel2oscar
We bred cows for milk and pigs for meat. And pigs are ornery and not exactly as open to the idea of sharing their milk as a cow apparently.
u/Wonderful-Road9491
One time when I was a kid I milked my dog and tasted it and it was meh at best
u/Ok-Comment-9154
He did. When Robert De Niro asked if you can milk him he yelled at the screen 'YES!!' This is actually a sensitive topic for him.
u/meow4352
“I have nipples, Greg. Can you milk me?” Thanks for the laugh!
u/FWR978
Weirdest thing imma post today. Ungulates, in particular, make milk, a complete protein, out of mostly grass and fodder. Predator milk is less efficient, and it would be better to just eat t
u/LtPowers
> They like it. To the extent that it relieves the uncomfortable pressure in their udders, I suppose that's true.
u/sexrockandroll
Probably the time/cost of harvesting it is a big barrier. Cows are docile and huge and make a lot of milk.
u/Motorspuppyfrog
Size matters, too. Theoretically, you could get milk from a dog, a rabbit or a cat but how much milk is that and is it worth it? 
u/Joeshi
You should watch Meet the Parents.
u/DebutsPal
It's just really hard to milk a dog
u/Buford12
Humans can drink any mammals milk. We use cows milk, sheep milk, goat milk, horse milk, and camel milk, buffalo milk, yak milk, reindeer milk, and donkey milk. [https://en.wikipedia.org/wiki/
u/Slow_North_8577
But your dog was a male....
u/[deleted]
[removed]
u/Rammite
Mmmmm tall boob juice
u/chrispybobispy
I have nipples can you milk me?
u/therapewpew
you mentioned all the animals that we milk, but no one mentioned udders! I think horses and donkeys are the only exceptions? udders are p much the reason we selectively breed and milk those
u/Careful_Farmer_2879
Cows will literally walk up to an automatic milking carousel and get on it. Not making that up. They like it.

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