Maybe Jack read & fell in love with Orwell.
Have you noticed that Jack only posts emails that reflect a positive image of his factory and attempt to reflect that people are satisfied with their puppies.
Of course, most puppies are well fed as they are Jack's source of income. He is bound to talk in that smooth and squeaky clean tone whilst selling another 1500 dollar pup. (By the way thats the equivalent of a years salary for a well paid government office worker in Thailand)
The other side of the story however is that the other dogs are in cages for 23 hours a day and their only 'human' contact is with Jack when he bangs on the cages to get the dogs out or he rushes around throwing bowls of slop into the cages for them to eat.