A donkey and a cow are two different species. They cannot produce offspring. If a donkey were to persue a cow, it is a form of dominance behavior. He cannot sire calves or foals from the cow.
No.
Yes.
a man could mate with a cow although it may loose something...
Yes. A bull will mate with a cow more than once during her heat cycle if he is so inclined and if he has few other cows to mate with.
Put her with a bull or get her artificially inseminated.
mate a donkey mare with a donkey stallion
No.
It depends on what markings the horse and the donkey have.
No.
Yes. If you have a donkey sire and a horse dam then the foal will be a mule. However if you have a horse sire with a donkey dam then the foal will be a hinny. About 90% of mules can't reproduce.
Yes.
Yes.
a man could mate with a cow although it may loose something...
With mules or other donkeys. A donkey can mate with a pony and you get a podonk.
donkey cow
A cow
The cast of Cow-Cow Boogie - 1943 includes: King Jackson as Singing Cowboy on Donkey