No, not by natural means.
no
grey
It depends on what genes the foal gets. You didn't mention what color the horse was before it turned grey, so that makes this difficult to answer. Grey isn't a color gene all its own, its a color modifying gene. Grey horses start out a normal color, and then their coat grows lighter as they mature.If the grey horse is dominant for grey, the foal will most likely be born a color and change to grey as he ages. If the grey horse is not homozygous for grey, then the foal has a 50-50 chance of being grey.
I think the only you can do is dye the hair to the color you want
Unless you happen to know color theory, I suggest visiting a professional. If that is not an option, try to find a bottle of "Grey Magic" and add 10 drops to whatever color you are using.
green but they change to grey or blue also :)
grey is not a color. the opposite of grey is grey.
grey is not a color. the opposite of grey is grey.
Leopard geckos can be grey in color due to their natural camouflage in the wild, which helps them blend in with their surroundings and avoid predators. Additionally, genetics play a role in determining the coloration of leopard geckos, with some individuals naturally having grey coloring.
No. Protein cannot change a horses' color. Horses often change color but age is the main factor. Most young horses change color as they mature. Sometimes the change is minor. For example, a colt or filly being born a plain brown but maturing into a bay with the black stockings becoming more apparent with age. Sometimes the change can be drastic. For instance, a horse born jet black may mature into a grey, a dappled grey, or "flea-bitten grey", which can be almost totally white :-)
The most common coloration for a horses penis is grey. The color of a horses genitals will be in direct correlation to it's skin color. Most horses have grey skin, thus the penis will likely be grey also. However they can also be pink or mottled in color.
if it is GREEN throw it out, if it is grey and does not smell then it is just oxidised and safe