Sorrel or Chestnut?

Oh, well I'm used to calling the "redder" version sorrel. Iono just always have! =p

What a pretty baby!!!!! I'll take him....I love a sorrel horse!!!

Being so young, it's very possible he could be bay. Due to so much white, it's impossible to determine the color of his legs or most of his mane and young foals change color frequently. The white tail makes it most likely he's chestnut, but he *could* surprise you!

Thank you everyone for the replies and also for the compliments, we are very excited about him and it's always good to hear a horse looks good from experianced people so again thanks!
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I was kind of wondering if he could be bay too.

The stock horse breeds, at least, differentiate between chestnuts and sorrels: the former are brown or yellow and the latter are red or orange. Chestnuts tend to breed more chestnuts and sorrels tend to breed more sorrels (though of course, one individual horse can, throughout the course of its life, change through the whole "red" spectrum). I strongly suspect that there is an additional factor, either a tweaked allele or a totally separate modifier, that influences the exact shade of color.

I always kind of thought that the "difference" between chestnut and sorrel was that the sorrel had a flaxen mane while chestnut did not.

No, a chestnut/sorrel with a flaxen mane and tail is just called a flaxen chestnut/sorrel. Like Bubba said, sorrels are really orangey and chestnuts are the more brown shades of red.

According to Dr. Sponenberg chestnut is the base color with sorrel being one of the many shades of chestnut. This lovely foal also appears to display the tobiano pattern....

This is one of those funny things. Chestnut and sorrel both have the same basic meaning, that a horse is genetically red. However, depending on the particular shade of horse, whether it gets called chestnut or sorrel will greatly depend on the person talking, the area you are located in, and the discipline you ride .

All that aside, I also believe he is likely some shade of sorrel/chestnut.