Fillers are often added to feed to increase the volume offered. For example, fillers increase the volume of dog food from 450 to 500 milliliters without significantly changing the properties or nutritional values. However, this reduces the energy content per volume or per mass of the feed. Water and air are traditionally used as fillers, although these are not considered additives, but cellulose and polydextrose are also considered fillers.
Fillers are found particularly in light products, which can then keep their promises of containing less sugar, for example. We at haustierkost.de, on the other hand, only use fillers in the form of crude fiber in our food for dogs , cats and ferrets as a fiber supplement. With BARF, feeding is of course the main focus. That is why it is important to ensure balance. You will find fillers in small amounts in beef and poultry food, for example, as these can help with digestive problems, obesity or allergies.