My biggest concern would be wearing a copper braclet whilst dealling with animals .... having nearly lost my ring finger when ring caught on gate with bullock pushing gate .... I guess copper is a fairly soft metal and would bend in such instances but worth thinking about if you are dealing with livestock daily
I had the most awful infection in my arm from wearing a watch with a metal strap (not the expanding type) whilst working on a pig farm. I got knocked over, the watch strap sprang open in the kerfuffle, the pointy part got dug into my arm, along with a lot of pig poo, as I fell. I ended up at hospital with the most swollen arm you ever did see, getting heavy duty antibiotics and holding my arm upright for several days, and I still have the scar.
A year or two later, my Mum wanted to buy me a watch for my birthday, and took me to her local House of Fraser store, Rackhams in Birmingham City Centre. The watch I liked the most had a metal strap so I explained why I didn't want it. Of course they could swap the strap, so I chose a leather one, the assistant fitted it and all was good. She and Mum were then trying to persuade me to have the metal strap as well. The assistant gently suggested that perhaps on days when I did not think I would end up on a pig farm, I might like to wear the other strap. I was so taken with her sales style I gave in, but despite not working on another pig farm and going into computing shortly afterwards, I don't think that strap ever came out the box, lol.
Edited to add, these days we don't feel the need to wear timepieces, do we, having our phones with us at all times! Back then, not wearing a watch at all whilst working on the farm didn't even occur to us.