Because the whole idea of eugenics is to get something better by breeding the best. When you breed one winner to another winner, you improve your chances of getting another winner (at least in theory). The whole point of racing is to make a horse faster (although "stronger" should be in there too, but is often ignored, which is part of why so many horses get injured).
In an attempt to produce an even better race horse.
why does a horse breeder practice on two winning race horses
If you are a licensed breeder and have a stock of horses to breed from yes. The horses have to be studs though
Depends on what you're breeding them for, bloodlines of the horses and popularity of your horses and farm.
it is when the second horses head is even with the winning horses neck.
Sell droppings, sell horses, buy horses and sell them for profit, do competitions, and do lessons.
Skills required to be a horse breeder include knowledge of horse anatomy, genetics, and breeding practices; a good understanding of equine health and nutrition; strong observational and decision-making skills; and the ability to work well with horses and other professionals in the industry.
Handicapping is simple. It is when horses of all abilties race together. The best horses with more chance of winning will carry more weight and the horses with less chance of winning will carry less. This is set so that they all have an even chance of winning.
To the slaughter house.
A horse raiser is commonly referred to as a "breeder" in the equestrian field. This individual focuses on breeding and raising horses for specific purposes, such as racing, showing, or companionship.
You would use essentially the same technique to breed horses with golden coats that you would use to breed for any specific trait in any animal. You look for animals who already have that trait, or who have it even to a partial degree, and you breed them together, and then you select the offspring who best exhibit that trait and breed them, and so forth.
I believe haras is translated as "breeder" referring to horses. i.e. haras de caballos