Only on Sundays.
Seriously, no. Cows give only one kind of milk. White.
A calf would drink the milk direct from a cows udder, or it can be fed the milk from a bottle, but you can not put the milk back into the udder.
Chocolate should not be fed to dogs. Perhaps you are thinking of carob.
The average Jersey Cow produces 22 liters of milk per day (5.8 gallons)
Most cats are lactose intolerant and should not be fed cow's milk.
The cow that gives the least milk is the cow that is unable to feed her calf despite her efforts and good intentions. The calf would end up needing to be bottle fed and/or the cow injected with Oxytocin to encourage milk let-down. If the Oxytocin does nothing, then it's time to ship the cow. As for breed, Charolais and some lines of Herefords are the poorest milk producers.
the farmer who fed his cow birdseed and started selling cheep milk
A young cow can produce 25 gallons of milk a week. A jersey cow, 28 gallons per week. Guess it depends on the size of the cow. And no, cows that stand in the shade do NOT give chocolate milk. :) My parents Holsteins were giving approximately 40-49 gal a week. My Jersey on silage will produce 35gal per week. On grain and hay she will produce 28gal per week. How much a cow produces depends a lot on what they are being fed and how stressed they are. A happy cow will give more milk than an unhappy cow, and the higher the quality of the feed, the more milk they are able to produce.
A cow's nutritional requirements are much higher during lactation than during her dry period. Milk requires a lot of input from the cow to be produced, and quality feed has to be there in order for milk to be produced. Without it, milk production drops and the calf is left hungry or stunted and the cow nearly starved. A cow will utilize a lot of her bodily systems to produce milk if the feed she's given is poor quality, which will bring her down in condition. This is not very good for the cow, though really makes no difference to the calf. So in order to produce more milk and to keep a cow from going down or shrinking in condition, a cow has to eat or be fed good quality forage.
the farmer who fed his cow birdseed and started selling cheep milk
Not really, but it may have a little bit of an "off" taste, just like if cows were fed onions.
Is this 4% on an as-fed ration or as a dry-matter ration? Technically it would depend on the cow, but usually most Holsteins give around 20 to 30 gal. of milk per day.
As long as the milk is straight from the cow, not the stuff that has been modified by humans (i.e., milk that has undergone pasteurization). Calves are best put with a nurse cow than if they were bottle fed.