No. The horse can be any color as long as they train and are ready.
I believe there are more brown horses than black horses thet enter a derby.
Twenty horses can race at a time
The Kentucky Derby
Horses can only enter the derby when they are at a certain age, which means that can't enter the derby more than once. So the answer is pretty much none. But they can enter the Preakness and Belmont Stakes after the Derby in the same year.
All were colts in the 2011 Kentucky Derby. With the exception of one gelding, Comma To The Top
the most wins for anyone-trainer, jockey, or owner is Calumet Farms has won with 8 of there horses (horses can only race once as a 3 yro)
Bay (brown body with black mane and tail) is the most common color in horses.
Black points are found most commonly on Bay and Dun horses. The black points are the black markings on the horses legs and tips of the ears.
Big like how? It's 20 horses, 1 1/4 miles long, and Americas most popular race
No, they see most colors, but not red. Red looks pale green to horses.
black or a dark brown
I have seen horses race as yearlings and to be in the Kentucky Derby they must be three. It just depends on the race! Most thoroughbreds begin racing at age 2.
Assuming you are speaking of the Kentucky Derby: This Grade I Stakes race is for 3-year-old Thoroughbreds of either sex. A Thoroughbred technically turns its next age on January 1 of any given year. Because horses generally are born between January and June, a horse entering the Kentucky Derby, which is held in May, usually will be 3-years-old both technically (because of the January 1 date) and actually (because most are born before the early May date of the Derby) -- but there may be as much as a 4- or 5-month difference in the actual ages of the horses in the Derby.