targetsmom
Well-Known Member
I'll chip in again and try to answer some questions. A good point was made about breeding to another type of HOMOZYGOUS Pinto. If you bred that LWO+ overo mare to a homozygous Tobiano stallion (tested negative for LWO just to be completely safe) you would have a 100% chance of a colored foal. Way to go!! We are breeding our LWO+ (solid looking) mare next week to a Tobiano pinto LWO negative stallion (but not homozygous) and I think our chances of getting a colored foal are better than 50%, with 0% of a lethal white. I'll take those odds. Now we might get a Tobiano or Tovero foal, but we only care about being able to register it as a pinto so we can show in the Pinto Shows in our area. We don't care if it is flashy - healthy would be fine.
I won't try to go into detail about what LWO is other than to say it stand for Lethal White Overo, and is an issue with pinto frame overo horses of any size. Frame overo is one of the common pinto color patterns and looks a bit like irregular white patches, "framed" in a dark background. Some horse that are genetically frame overo appear solid but usually (always?) have facial white and may have blue eyes. If you breed 2 horses together that are positive for the frame overo gene (LWO+) then you have a 25% changce of getting a "lethal white foal" which will die in 3 days due to intestinal problems. And you still only have a 50% chance of getting a frame overo. Very brief and I hope I didn't leave out anything important. Testing can be done for $25 and is worth every penny!
I won't try to go into detail about what LWO is other than to say it stand for Lethal White Overo, and is an issue with pinto frame overo horses of any size. Frame overo is one of the common pinto color patterns and looks a bit like irregular white patches, "framed" in a dark background. Some horse that are genetically frame overo appear solid but usually (always?) have facial white and may have blue eyes. If you breed 2 horses together that are positive for the frame overo gene (LWO+) then you have a 25% changce of getting a "lethal white foal" which will die in 3 days due to intestinal problems. And you still only have a 50% chance of getting a frame overo. Very brief and I hope I didn't leave out anything important. Testing can be done for $25 and is worth every penny!