Generally, the earlier calves are castrated, the better. Castrating calves in the first few days of life leads to a smaller wound, faster healing and less profound impacts on growth compared to castrating older calves at spring processing, weaning or in the feedlot. There’s also some evidence that newborn calves feel less pain than older calves. Castrating calves as young as possible is generally best for animal welfare, but small, cuddly baby calves also tug at the heartstrings more, if you’re trying to make a consumer feel guilty about eating beef.
Producers couldn’t do much to practically alleviate castration pain until injectable meloxicam was approved for use in Canadian cattle a few years ago. This was followed by even more user-friendly anti-inflammatory drugs, including pour-on banamine and an oral meloxicam developed by a Canadian company (Solvet).
At the same time, industry-funded research demonstrated that meloxicam reduced surgical or castration pain in calves at weaning, spring processing and even shortly after birth (although weaning weights didn’t improve). This independent science supported the efforts of extension experts, veterinarians, industry groups (and, of course, the drug companies) to encourage the adoption of these products. Industry surveys then tracked how producers adopted them across the country over the years.
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