'Teenage' Angst in Cows?

A Canadian study has suggested that dairy cows, like humans, go through mood changes as they go into puberty (https://www.theguardian.com/science/2020/feb/12/moo-swings-cows-go-through-disruptive-puberty-too-study). Some of the animals become more shy whereas others show increased  inquisitiveness. This is hardly unexpected, as there are major hormonal changes and changed behavioural imperatives at this time in both these mammalian species.