I'm just curious - is there a strong relation to the colour a bay foal is when born and the colour as an adult? Can you tell by looking at a foal whether he's going to be a bright blood bay, for example, or a darker bay?
Do the colours of his parents give any indication if neither is brown or bay?
We have a light red dun QH in foal to an apparently homozygous black Friesian. Sounds like chances are good the foal will be either Bay or Bay Dun, so I was wondering whether it's possible to know what kind of bay you'll wind up with. :)