[QUOTE=sniplover;3712120]
Iiinteresting. I’d never heard of that color description before, and try to keep myself up to date on color stuff, since I find simple Mendelian inheritance of traits fun!! I am a nerdy scientist, who knew? :lol:<SNIP>
Oh boy… WAAAAYYY over my head, but that’s all good! 
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Your mare, being a bay, must be EE or Ee. Since she’s had chestnut foals by stallions that carry the chestnut allele, she must be Ee. Snowford O’Donnell appears to be EE, as he has no chestnut offspring any where I can find (any boy do I enjoy looking at them!!). The only base coat your foal can have is Ee or EE; both encode black. He might be bay over that, since your mare has clearly carries at least one agouti allele.
If you were going to test him for anything down the road, I’d just go for agouti! I’d love to know what causes the silver tail! It’s super cute and so is he :D[/QUOTE]
Cripes, me too… I’d ESPECIALLY like to figure out how to get that gorgeous dark coat, with silvery tail AND mane… I can spell “automatic value increase” due to extra chrome!
As to the stallion (Snowford O’Donnell) throwing blacks - eeehhh, I’m really kinda picky on blacks. Too many people say they have blacks, and then you see the horse, with the tan hair on his nose, or in his flanks, or around his ears… NOT black, IMHO. There are a ton of O’D offspring around here, I’ve had hands on many of them - and I’ve not seen a true black in the bunch, despite what owners may insist. They are shiny black-ish horses, but not true black.
NOW, it’s going to be interesting to see what we get from Dreamer’s mama (the chestnut producing bay) bred to our grey son of a TRUE BLACK RID stallion, Touch of the Blues.
Crap shoot, I know… but TOTB’s mama was a liver chestnut, and he HAS thrown some incredible true blacks.
So, Sniplover, roll your Mendelian dice - what are the color chances on THIS cross? Here’s the baby’s first picture 
http://irishhuntersandjumpers.com/Images/Oliver/2009foals/Pleasy-scan.jpg