You are doing a great job with your english.
A couple of minor corrections.
"If you go to the forum there and klick
on "Pferdebilder unserer User" and then "Unsere Andalusier Teil 3" or "Unsere Andalusier Teil 4", you will see lots of young horses, who turn white later on... "
The english word is CLICK not Klick. Meaning to click on a link with your mouse.
A couple of corrections in this sentence.
"But an arabian male
at our stable will get
it's foal in early summer"
The term is MARE not MALE.. A Male is a Stallion or Gelding. A Mare is mature Female horse. A filly is a Young female horse.
Colt is a young male horse.
Stallion is an adult male
Gelding is a adult male that has been gelded.
Filly is a young female horse
Mare is an adult female horse
Foal is a baby horse of either sex.
We would probably refer too a mare giving birth to a foal as. "An Arabian mare at our stable will DROP her foal in early summer". Or " the Mare will Foal in the Spring"
I bought a Foxtrotter at 4 years old that was very grey. He was born and registered as a Chestnut Roan. By age 10 he was very white. Even his mane and tail that had been very black at 4years old had greyed out and was becoming white.
But I also have a black horse that will always be black.
My Grey horse at 9 years old