chewing cud is mostly done by cows, goat, sheep etc. this takes place in RUMEN . 1st it eat's the grass , after sometime it sit's comfortably , the rumen helps the cow to make the cud come back in it's mouth then it will chew it , this process ; the cow will do it for a long time.
A donkey is NOT a cud-chewing animal.
A lump of chewing tobacco is called a quid. A variant of the word: cud quid - (noun) a lump of chewing tobacco
The times you see them chewing are when they are chewing their cud.
"To chew the cud" is "ruminer" "The cud" is "la panse" A cud-chewing animal is "un ruminant"
Cud. Cows regergitate grass and it is call cud. Hence cows chew their cud.
If you are asking why they call it that, it could be because some people look like like they are chewing their cud while they are chewing gum. Cud it regurgitated feed that the cow then rechews.
Ruminants
Yes.
A cow will eat grass and then swallow it , then after it has been in their stomach for a while they will then do a bit of a reguritation or throw up and then re chew that grass this is what is called their chewing of the cud
Ruminate.
No. Zebra are close cousins to horses, which are not cud-chewing animals because none of them have four chambers in their stomachs; just one simple stomach.
It is called rumination, or chewing cud. Also, see the related question below.