However! They're identifiably, understandably stupid, like a tiny human with terrifically poor planning, observing, memorization, predicting, social, and emoting skills. It's not an alien kind of stupidity like that of a fish, insect, plant, or rock (or computer program). I can say with great confidence that chickens are quite low on the emotion/intelligence spectrum, but in saying that I'm quite confident that they're on it.
If your criteria for animal cruelty is achieving a particular level or capability on the sapience/sentience spectrum, you can feel pretty safe eating chicken. If your criteria is that they not posses intelligence or experience emotions at all, you'd better go pescatarian. Or eat mutton: if sheep have any intelligence at all it's completely undetectable to me.
I assure you, they are not anything like you described. And across breeds, they have wildly different cognitive capacities, so a broad-stroke description like this is inherently inaccurate.
Vs. prejudice and bigotry.
Whistling in the wind!!
Bio-reactors are pretty stupid.
https://hitchhikers.fandom.com/wiki/Ameglian_Major_Cow
Here's a clip with the cow from the BBC's H2G2 TV series:
https://onlinereadfreenovel.com/piers-anthony/47321-in_the_b...