Dog doing behavioural test (IMAGE) Eötvös Loránd University Caption In animals, and often in humans too, performance is significantly impaired when the value of the reward for work is reduced. Argentinian and Hungarian researchers have studied what happens when family dogs are forced to switch from a cooked liver reward snack to dry food. The results show that dogs are not as sensitive to such replacement as other mammalian species. Credit Photo: Enikő Kubinyi Usage Restrictions Credit must be given License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.