I saw a post where someone said they had a chestnut (not sorrel) QH, and another posted quoted her later and said they were the same color.
When I was growing up, with 4H and PC, sorrel was a word I never heard.
Then, when I moved to the South, anything that was what I called a chestnut was called a sorrel. And then there were “brown” horses that I would have called chestnut or liver chestnut perhaps.
To me chestnut = red or brown horse with same or similar color mane, tail, legs; I might describe something as a chestnut with flaxen mane/tail for lighter. Bay = red or brown horse with black mane, tail, legs.
The BF, who is a range cowboy, and I went to a rodeo where we were discussing this after his event. He called “red” chestnuts sorrels and “brown” chestnuts chestnuts. Bay was bay. Dark brown chestnuts (liver chestnut-ish) were sometimes brown, sometimes chestnut. He said red horses are NOT chestnuts. Me? I’ll never use the word sorrel, and it’ll always be a chestnut. He can correct me until his chew falls out.
Breed thing? Discipline thing? Regional thing?
I’m not looking for definites, just thoughts.