An adult goat will drink between 3/4 and 1 1/2 gallons of water per day on average.
You need to get your goat pregnant as she won't produce milk until she has had kids.
You could get possibly 8 gallons of milk from them a day but the more they eat the more milk they produce but the maximum of gallons is 8 and that is 180 milk cartons that they serve in school cafeterias
milk it's healthier too Goat milk is milk produced by a dairy goat
Cattle milk, sheep milk & GOAT milk
Milk and meat
The goat will produce milk, cheese, butter, cashmere, wool, or will be slaughtered for meat.
Swiss Alpine
To produce meat, milk and/or fibre.
There is 170 calories in a cup of goat milk.
Puppies do not produce milk. Full-grown dogs do so, but not puppies.
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If you mean by production, it can depend on the breed or just the goat in general. I have 2 here that when in full milk just after kidding get milked twice a day producing 2-3 litres per milking, but have also had a goat that produced 4-6 litres per milking (around 10 litres a day, she was a big producer)