Lethal White (Frame) Overo
Information & helpful links
We have provided some helpful links for those
of you who want to learn about frame overo
(lethal white overo LWO)
Millenium Miracle & Tristans Millenium both carry
frame overo (LWO), which is also largely
responsible for their beautiful coat
If they were crossed with another
carrier of the frame overo gene, there would
be a 25% chance they would produce a lethal
white foal (which unfortunately always results in
With Millenium Miracles color rate, as well as his
large amount of frame patterned progeny, if
you were to choose to cross a frame overo
mare, your odds of getting a lethal white is more
like a 75% risk.
We do not reccomend you take the risk with
any AQHA, APHA or JC mare, solid or otherwise.
Testing to be sure of your mares frame overo
status is cheap easy insurance.
It is important to know that this is NOT a disease
It is a color gene that produces
color when in heterozgous form (one copy).
Only if Sire and Dam both have the gene, and
BOTH pass on the gene does it result in a
Lethal White Foal. Due to frame overo having
varying pattern expressions, a "solid", a visually
tobiano horse or a 'tovero' can carry frame as
well. We reccomend testing on all quarter horse
mares, breeding stock paints along with regular
registry mares. The frame pattern is also in
thoroughbred lineage, and while less common
can be a risk as well.
We feel that it is an individual choice and want to
provide you with the best information available.
Please visit the following links and if you have
further questions or concerns, contact us
Frame overo hides well within the tobiano
pattern, often going unnoticed even after
registration with APHA. It is good to keep in
mind how many horses are registered as the
wrong pattern. This leaves potential for
"tobiano" horses, despite a pedigree full of
tobiano horses, the potential of carrying frame
overo as well.
Test your mare!
Examples of frame overo at work.
Some with the combination of other genes.