Science is wild
We recorded 333 high-frequency vocalisations from 13 Holstein-Friesian heifers during oestrus and anticipation of feed (putatively positive), as well as denied feed access and upon both physical and physical & visual isolation from conspecifics (putatively negative). We measured 21 source-related and nonlinear vocal parameters and stepwise discriminant function analyses (DFA) were performed. Calls were divided into positive (n = 170) and negative valence (n = 163) with each valence acting as a ‘training set’ to classify calls in the oppositely valenced ‘test set’.
Did you get that? Researchers recorded cows mooing. Horny cows, hungry cows about to be fed, hungry cows not about to be fed and lonely cows. They analyzed them by cow and state of mind (‘valence’ in this context meaning mood). They wanted to know if cows have individual voices, and if those voices remain individually recognizable no matter how the cow is feeling.
Spoiler: they do.
Oddly enough, science is only beginning to explore domestic animals and livestock in this sort of way. I have thunk long and hard about chicken toys, and keeping chickens amused. Not so much for my own flock, which gets regular free range time and a view of the garden when they’re penned up, but I’d like commercial flocks to have happier lives. I like eating chicken and I’d like to feel less shit about that.
Pro tip: ‘animal welfare’ people are the ones trying to make livestock happier. ‘Animal rights’ people are the nutters who think monkeys have human rights and domestic animals are traitors for working with people.
p.s. the cow study was in Australia.
January 15, 2020 — 9:14 pm
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