Milk, just like any other mammal.
A camel calf.
Camels only have one calf at a time. Having twins is unheard of.
Yes, some lactating mothers will feed abandoned calves.
I helped grandma feed the calves.
To feed camels. Camels eat cactus.
No, "camel" is a generic term, female camels are called cows, male camels are called bulls and their young are known as calves.
Stockers.
Yes
Not really, no. Calves should be eating plant-type feed, not insects or insect larvae.
The reason cattle produce milk in the first place is to feed calves, not to feed people. Frisian cows in the wild--if such they be--"get rid of" their milk by letting calves suckle it.
Plenty of green grass and or hay and a 12%-14% creep feed. The calves need lasalocid for good rumen development.
That's not the bull's responsibility, nor his job. His job is to get those calve's mothers bred to have calves again, not to feed the calves. The cows themselves are the ones responsible for feeding their calves via milk from their udders and teaching them what's good to eat and what isn't.