Wells Brothers now has DYNE.  This is a liquid supplement that has 150 calories per ounce. It is listed for dogs, cattle, swine, goats and sheep. Not recommended for cats or kittens. A quart sells for $18.50.

Dyne High Calorie Liquid Dietary Supplement provides energy and extra nutrition for pets recovering from stress or illness. Tasty vanilla flavoring should appeal to pickiest of eaters. As a supplement to other foods, it promotes weight gain and provides more energy for working dogs, pregnant dogs, and dogs recovering from sickness. This high calorie supplement can be sprinkled on top of your pet’s food, fed with an oral syringe, or mixed with water to combat dehydration. Do not give to cats or kittens.