A US-based pet nutritionist has advised consumers to purchase pet food which is rich in omega-three fatty acids.
Joseph Wakshlag, a clinical nutritionist at the Baker Institute for Animal Health at Cornell University, expressed his belief that premium pet food often contains nutrients which can help brain function.
He wrote in the New York Times: "I am a fan of seeing a soluble fibre source, as well as a source of long-chain omega-three fatty acids. Often the higher-cost foods have had a 'more cerebral' thought process put into their formulation."
Mr Wakshlag added that certain ingredients used in pet food, such as corn, soy and rice, have wrongly been attributed to poor digestion in animals, as well as leading to the onset of certain allergies.
The majority of animals can digest corn and rice, according to Mr Wakshlag, while they are only associated with allergies due to their widespread use.