In some cases only the lucky ones are destroyed with euthanasia and the unlucky ones, well cheaper methods are used. Often times the males are kept in equivalently poor conditions as the females. The dogs are almost always kept in small, cramped cages, often with wire bottoms, which can cause permanent damage to a dogs feet. Many times they are kept outside with only a thin piece of plywood as protection from the elements. Others are kept in sheds with very poor lighting and ventilation.
Malnutrition is also common.
In many cases the dogs in a puppy mill are fed the minimum to keep them alive and producing. The less food that has to be bought, the higher the profit margin for the seller. Often the females are only well fed when they are suckling puppies. The food is almost always the cheapest that can be bought, often not meeting the dogs nutritional requirements. In almost all cases neither males or females receive adequate veterinary care.