The paper studied 35 Holstein cows on a dairy farm in Volgograd region in 2023. The cows received a balanced diet with corn silage. hay. concentrated forages. https://www.bekindtopets.com/save-big-T-S-Brass-B-0665-CR-BSTR-Wall-Mount-Rough-Chrome-Service-Sink-Faucet-w-Stops-and-Cerama-Cartridges-super-buy/