Bob

From WNC, thank you

Evolution isn’t necessarily purpose driven. I know that sounds counterintuitive. Gene expressions can be random af and when they aren’t selected for or against, they can carry on for many reasons, sometimes just because they’re located on the chromosome near something that IS selected for. That’s just one example, there’s a lot of reasons something like this carries on. Maybe these horses have been bred for one thing and this is a genetically related side effect. Evolution is weird and accidental in many ways.