Wow. The answer is no. Cud is not a technical term. But "cud" is the regurgitated rumen contents (food it already ate) that requires further mechanical breakdown (typically roughage with more stem content) before it can be fermented more efficiently in the rumen.
Yes. Bulls do the same things as cows do, except produce milk and give birth to calves.
Cud. Cows regergitate grass and it is call cud. Hence cows chew their cud.
Nothing. Cows usually don't "lose" their cud anyway.
When cattleappear to be chewing they are doing exactly that, although I think you are referring to when cattle are chewing their "cud". Cattle regurgitate a small portion of food, known as their cud, and chew on it.
Let it relax. The cow won't chew its cud unless it feels unthreatened and comfortable.
The times you see them chewing are when they are chewing their cud.
Yes, to be rechewed as cud.
Depends on what breed you are referring to. Dairy cows give a lot of milk; beef cows don't.
cows...! DUHHHHHHHHHHHH! where else would COWS milk come from? I mean COME ON!
They have the same four-chambered stomach that cows have and are capable of chewing cud just like cows do.
Angus cows are beef cows, not dairy cows. Holsteins are dairy cows, not beef cows, which is where we get the majority of our milk from.
No, Brown cows do not have brown milk.