Dunlin (Calidris alpina) - A medium-sized shorebird with a drooping bill, adult dunlin can be easily recognized while in breeding plumage by the large black patch on their otherwise white bellies. Familiar around the world, dunlin spend their winters up and down coastlines across the entire Northern Hemisphere.
Preformed vitamin A is found in animal products such as meat, fish, poultry and dairy foods. The other type, pro-vitamin A is found in plant-based foods such as fruits and vegetables. The most common type of pro-vitamin A is beta-carotene.
Pet food manufacturers generally rely on animals or plants (or both) as protein sources. Animal sources of protein include beef, chicken, lamb and fish; corn and soy are common plant sources. But some proteins are better than others at providing essential amino acids that can be used by the animal. In general, animal sources of protein yield a better balance of essential amino acids for dogs and cats than plants do. But if the protein source isnât digestible, the diet wonât be effective.