Esbilac Puppy Milk Replacer Liquid is all natural with no preservatives. The Replacer Liquid is a complete food source for orphaned or rejected puppies or those nursing, but needing supplemental feeding. It's also recommended for growing puppies or adult dogs that are stressed and require a source of highly digestible nutrients. Esbilac Liquid Milk is a complete diet for puppies fortified with vitamins and minerals. Available in convenient ready-to-feed liquid.