If you look at the stats from the big rides like the Tevis, ROC, etc, where 
they post the horse color along with the results, you will see that a 
higher proportion of greys finish in the top 20 than their overall 
proportion in the field.
For instance, lets say that the field is 50% grey (probably not as likely 
anymore since nobody wants to breed greys) then, you would expect the top 
20 horses to be 50% grey.  However, consistantly over the years I've 
calculated there have been a higher percentage of greys, than their overall 
proportion, in the top 20 on these big rides. 
Eighteen years ago, when I first started endurance riding, the greys had 
the majority of the field in any given competition.  But now all the 
breeding is for color.  
As for cancer, my 23 year-old grey mare never had a melanoma until last 
year.  I gave her immune system a boost with nutritional supplementation 
and that tumor is gone now.  I've never had a dark horse live this long so 
I don't know if they tend to get melanomas or not.
Linda Van Ceylon
lvanceylon@vines.colostate.edu
phone:  970-491-1428
-------------
Original Text
>From loomis.102@postbox.acs.ohio-state.edu (Shannon Loomis), on 4/1/96 6:06 
PM:
To: endurance@moscow.com
hello,
I read a post saying that they want a dark horse in a check and a white
horse on trail.  I am curious as to what people prefer.  I noticed a wanted
ad for a grey horse for trail not to long ago.  Does everyone prefer a
light-colored horse?  My dark horse has never ever overheated and cools
down very nicely.  I try to avoid greys for several reasons, even though I
really like dapples.  First of all, I can't keep them clean.  Secondly,
white legs tend to get scratches worse (of course, socks on a dark horse
are just as vulnerable.  Third, sunburn, no explanation needed.  Finally,
in the neoplasia course I had last year, every other signalment was grey
horses.  They seem to get every cancer known to horsedom.  My prof said
there is no such thing as an older cancer-free grey horse.
Any opinions?
Shannon Loomis and Quail Meadow Star (and Quark, the grey emergency back-up
Arab)
The following was included as an attachement.  Please use UUDECODE
to retrieve it.  The original file name was '96 6:06 
PM:
To: endurance@moscow.com
hello,
I read a post saying that they want a dark horse in a check and a white
horse on trail.  I am curious as to '.
begin 666 96 6:06 
PM:
To: endurance@moscow.com
hello,
I read a post saying that they want a dark horse in a check and a white
horse on trail.  I am curious as to 
!````
`
end