Stuffy has been tested. She's
EE, aa, nZ, tT. She will always pass a black gene to her foals EVEN if bred to a chestnut stallion. NONE of her foals will ever be "red". She can't pass a bay gene, however, the foal COULD get a bay gene from a stallion if he carries 1 or 2 A genes. She won't always pass her Tobiano or her silver gene - her first foal was a solid silver black colt by a dark bay stallion (even though not tested, I'd say the stallion was aA for bay. He had other black foals as well)... Since she only carries one tobiano and one silver gene - she could produce a non silver or non tobiano foal (her first colt wasn't pinto).
Shamrock hasn't been tested yet. Due to her sire being
EE, aa, nZ , tT and her dam also being
EE, aa, nZ, tT - she will be
EE, aa, ?T, ?Z.
Tobiano (
tT or
TT) doesn't affect the color as it's a pinto pattern. A horse is either
tt (not tobiano),
tT (tobiano - 50% pinto producer) or
TT (tobiano - 100 % pinto producer). The
T doesn't tell you how much white your foal will have. Several have told me that some of mine carry other patterns as well - but after testing for several of those patterns as the tests have come out and having them all negative, I'm no longer "wasting" my $$ that way. I will test for the base, silver colors and Tobiano pattern only... I have quite a few to complete testing on again - youngstock that I've bred and mares that I've purchased.
Several of our ponies also carry a type of roan pattern (incomplete) which seems to be "popular" in the Shetlands and Minis. YES, I love all the color combinations as well. I really LOVE my silvers
and all the different colors I get.
My neighbors call them the ugly "tan" ponies
And my family, the 3 daughters that are no longer living here and don't handle the ponies much, can't tell them apart unless they have their names on their collars!
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One of our 2013 foals is a little different! He's our 2nd silver bay (and !LOOKS! chestnut). He's
EE, aA, nZ, TT. He hasn't been tested, but by all rights, since both parents have been, I don't need to test him. His sire is Iggy (
EE, aa, nZ, TT) and his dam is Cheri (
EE, aA, TT).
If he remains a stallion that is used for breeding, he can be bred to all the chestnuts you want to cross him on - the resulting foals will never be chestnut. They could be bay - but they will all be eE (black). A mare with a cream gene will mean the foal would be buckskin or smokey black. All foals will also be Tobiano and 50% can be silver.
His color genetics are fascinating but it remains to be seen if he is stallion quality. I would love to have a couple of full sisters to him with his coloring! There's no guarantee that I'd get the bay or silver on more foals from this cross. They will all be EE (homozygous black) and TT (homozygous tobiano).
He has a WONDERFUL personality so far! I'm very happy with him.