[9rx]

> Most people think that cows are simply bred to produce milk without pregnancy

Am I misinterpreting you here? You're saying most people think cows are bred (you know, what causes pregnancy), and presumably think that that calves are born — I've never met anyone who didn't know what a calf is, but somehow don't realize that pregnancy happens inbetween?

[Sharlin]

Yes, you're misinterpreting me. Breeding involves making calves, obviously. But once you get the hypothetical continuously-milk-producing cows, they don't have to make calves. Making more cows can be delegated to cows specialized to making more cows, so cows producing milk for humans can do that without inconvenient pregnancies.

But that's not how it works. Every single milk-producing cow must have been pregnant at least once, and typically several times in its life to keep producing desired amounts of milk. And the calves are an unwanted byproduct that must be taken away. At least they're not shredded in a big blender like the male chicks of egg-laying chicken breeds are.

[9rx]

> they don't have to make calves.

Where else are you going to get them from? A calf factory?

> And the calves are an unwanted byproduct

Am I misinterpreting you again? Heifer calves are the prized possession that ensures that your dairy continues into the future. Cows don't last forever (or even all that long).

You maybe had a stronger case for bull calves, but now that modern breeding can select for heifers with ~90% confidence, that's hardly an issue anymore. And, I mean, in this day of age of high-priced beef, even if you get the occasional bull you're not exactly complaining either.

[aziaziazi]

> modern breeding can select for heifers with ~90% confidence

May you expend on this? I know we kinda have selection techniques for eggs to crush them before hatch but I guess that’s not what’s happening with milk caws as the diary is the main target and the cow need to give birth to start lactation. Or perhaps it’s the impregnating technique or some hormone therapy that tricks the odds?

> in this day of age of high-priced beef, even if you get the occasional bull you're not exactly complaining either.

I depends on the breed: in this days of high volume diary and meat consumption, most of what people eat comes from specialised breeds that hare very good at producing milk OR muscle. The non-desired sexed are not so valuable. Switzerland (and others countries I can’t remembers) recently passed a calves handling low to require farmers caring them for a minimum days in response to industrial sloped into unethical territories.

That documentary shows another practice in India : some invaluable calve are just roped to a fence and forget until dehydration. https://christspiracy.com

[9rx]

> The non-desired sexed are not so valuable.

Huh? A holstein bull calf is selling for around $3,000 right now. That's... insane.

I remember from what doesn't seem all that long ago when fats didn't even fetch half that much. Beef has gone wild. If that's not valuable, what do you consider valuable?

[aziaziazi]

> $3,000 right now

I’m not sure we’re talking about the same data. Here’s the price evolution of lived calves in EU. They happen to be very high since 2025 (300€/500€ for diary/meat) but if you click « select all » on the top left you can see they use to be around 100€/200€ in the previous 10 years, going as low as 60€/head during covid.

https://agridata.ec.europa.eu/extensions/DashboardBeef/LiveA...

> what do you consider valuable

Fair point, I didn’t express it well: I don't think calves “have no value” in general, they’re sentient beings. However, as you pointed out and shown ahead, they are also part of a market and in some places their value is not high enough to care them well [0]. Some of them happen to be euthanized very shortly after birth:

> In one survey of Canadian farmers, an average of 19% of calves were euthanised at birth and of those respondents that euthanised calves, 34% reported using blunt force trauma (sharp blow from a solid object to the head) [1]

There’s also the "bob veal" (2–3 days to 1 month) [2], I guess the goal is to have a different taste but I’m not sure about that.

side note: I found the technique used to "select for heifers" you mentioned: the process is called flow cytometer and it sorts the sperm with a laser.

[0] https://www.journalofdairyscience.org/article/S0022-0302(17)...

[1] https://www.frontiersin.org/journals/veterinary-science/arti...

[2] https://www.britannica.com/technology/meat-processing/Labels...

[9rx]

> in the previous 10 years [...] [1] [2]

For the sake of understanding our communication breakdown, what suggests "in this day of age of high-priced beef" is talking about 5-10 years ago?

[Sharlin]

As I said, I doubt most people think about this at all. But if they do, I find it an entirely reasonable assumption that, as I said, if cows could make milk without making calves, in modern industrial farming the calves would be made by individuals that only make calves, and milk would be made by individuals that only make milk, for efficiency reasons. That's what I would assume, probably.