^^ NONE of us would know the difference even if we saw it with our own eyes. Still, a decent butcher would know the second that they look at it!!!
Having said that, I haven’t heard of any such situation occurring in my lifetime…although I’m pretty sure that it has happened at least once!!! We have humans born with extra appendages or an extra organ, so common sense tells me that it is possible in cows, pigs, chickens, etc.
We only have 1 butcher in here. The next time I speak to him, I’ll do my best to remember to ask him about this.