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The taste of happiness: free-range chicken

open access: yes
Happiness is an elusive concept, it brings about ideas of ecstasy, contentment, delight but also health and strength, pouvoir and puissance ... a state of mind and body that is precarious and contingent.
Mara Miele
core  

Preference assessment and reinforcer effectiveness in domestic cats. [PDF]

open access: yesJ Exp Anal Behav
Machado MA   +5 more
europepmc   +1 more source

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