Thresholds for sweet, salt, and sour taste stimuli in cockatiels (Nymphicus hollandicus)

Abstract 10.1002/zoo.1001.abs Little is known about avian taste perception and how taste affects food choice. We designed a study to determine the concentrations of aqueous solutions of common chemical taste stimuli that result in altered consumption patterns. Using two-choice taste-preference tests, we studied the taste thresholds of caged cockatiels (Nymphicus hollandicus) for aqueous solutions of […]

Mechanisms of decision-making and the interpretation of choice tests

Choice tests are commonly used to measure animals’ preferences, and the results of such tests are used to make recommendations regarding animal husbandry. An implicit assumption underlying the majority of choice tests is that the preferences obtained are independent of the set of options available in the test. This follows from two assumptions about the […]

Too hungry to learn? Hungry broiler breeders fail to learn a Y-maze food quantity discrimination task

Choice tests may aid determining whether qualitative dietary restriction improves the welfare of feed-restricted broiler breeder chickens (Gallus gallus domesticus). However, hunger-stress may reduce competency to choose by impairing learning. The effect of chronic feed restriction on the ability of broiler breeders to learn a hunger-relevant discrimination task was investigated using a Y-maze paradigm. The […]

Feed-restricted broiler breeders: State-dependent learning as a novel welfare assessment tool to evaluate their hunger state?

This paper reports three experiments that aimed to validate the use of state-dependent learning (SDL) as a novel welfare assessment tool to evaluate the hunger state of feed-restricted broiler breeders. In each experiment, birds alternated every 2 days between two food rations: quantitative feed restriction (QFR) and ad libitum access to the same feed (AL). […]