Do I need to clean My stallion's sheath more often a gelding's?
NOPE Sheath cleaning's primary goal is to remove accumulations of smegma (waxy secretions) 
that irritate the delicate skin in the pocket between the penis and its protective sheath. 
Smegma can even form hardened "beans" in the little moat around the urethra at the penis' tip making 
it hard for the horse to urinate.

Because stallions have higher levels of the hormone testosterone than are found in a gelding, he's likely to 
extend his penis to its full length six or more times per day, even when it's not breeding season. 

This essentially turns inside-out all the little folds, pockets, and nooks- and-crannies within his sheath, allowing 
small accumulations of hardened smegma to flake off. 
A gelding, on the other hand, rarely extrudes his penis completely, dropping it only partway to urinate. 
Cleaning the sheath twice a year is plenty for most geldings-more often than that and you risk irritating the penis' 
delicate skin, disrupting its normal bacterial flora, thereby increasing its susceptibility to infection. 

And your stallion? He should get by quite nicely with a sheath cleaning once a year or less. 
(Wild stallions never get their sheaths cleaned.) 

Will my boy grow taller as a gelding or a colt? 
Stallions may appear larger than life, because of their bluster and uppity nature. But it is believed that 
testosterone also causes the growth plates in their cannon bones and other long bones to close earlier than they 
would in a gelding. Once these plates close, they seal, halting further growth. 
Therefore, colts gelded before puberty (in most cases, before they're yearlings) may grow SLIGHTLY taller then those 
left intact.  (it is thought to be up to 1/2 an inch in bigger horses and ponies) 

Does my stallion need a higher protein diet than geldings or mares to maintain good condition. 
NO A heavily booked, healthy stallion might need added energy (fat and/or carbohydrates), because he's physically 
active during the breeding season. But unless he's showing signs of age (for example if he's developing a droopy 
topline or losing muscle mass), increasing his protein intake won't do much to keep him in shape. 
As with any horse, objectively check his body condition and weight once a week, and adjust his ration accordingly. 

Being overweight can adversely affect your stallions libido!

The best way to keep your stallion's genitals from becoming infected is to wash him after each breeding. 
Nope - The best ways to keep your stallion from getting infected is to book him only to mares certified to be healthy 
by a veterinarian, and to refrain from using live cover to breed any mares of questionable reproductive health. 
Although stallion managers used to wash a stallion's penis as many as three times daily during breeding season, this 
practice has fallen into disfavour, frequent washing irritates the penis' delicate skin and disrupts its normal bacterial flora, 
thereby increasing its susceptibility to infection. 

During a busy breeding season, Should I exercise or rest my stallion? 
Regular exercise is vital to keeping your stallion healthy and potent. 
Good circulation and fitness - are important for both his physical and mental well-being. 
Lack of exercise has been implicated as the most common cause of obesity in stallions, a real performance-buster 
during breeding season. 
Exercise also helps your stallion to maintain strong legs and a strong back, which are necessary for him to rise onto his 
hind legs, flex his spine, support himself in the mounted position, and thrust his pelvis, all without pain or discomfort. 
Of course, his exercise program should be invigorating and conditioning, not a strenuous workout designed to create a 
superstar athlete, which may be both mentally and physically stressful.

Stallions kept together in the same pasture will fight.
No - Although it's the nature of domestic stallions to fight over mares and their foals, 
they're not territorial-that is, they don't fight over the land they are on. 
Many stallions kept in the same pasture or pen get along as well as any geldings might, as long as there are no mares 
to fight over. 

In fact, large-scale breeders commonly turn out all their stallions together during the off-season, while mares and babies 
stay in a separate pasture. 
(PLEASE: Don't just throw your mature stallions into a paddock together... use common sense and realise all horses are 
individuals and SOME stallions CAN'T be run with other males.) 

A fever can adversely affect your stallion's sperm count. 
YES  Even a relatively mild fever lasting for only a day or 2, can weaken and kill existing sperm. 
It also causes new sperm to develop abnormally, which can decrease-or even halt-his fertility. 
And, a decrease in sperm quality can last as long as 40 days. '

How long does it take to "build" sperm?
From start to finish, the process of building a viable sperm cell takes 57 days! 
But it's a constant, ongoing process. At any one time, there are generations of sperm at various developmental stages 
in your stallion's testicles. 

What should I do about my stallion masturbating? Will it lower his sperm count? 
NOTHING and NO! 
Wild stallions, as well as stallions in confinement, will drop their penises, become fully erected, and "masturbate" 
(move the penis upwards towards the belly) as often as every 3 hours, if left undisturbed. 
But they rarely ejaculate - so the sperm count isn't adversely affected. And, contrary to popular belief, a stallion that 
does this isn't necessarily more potent or fertile; this is just normal behaviour that goes with the territory of being a stallion.