Abstract
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Highlights
Physiological parameters for positive human-companion animal behaviour have been few and limited to changes in humans only
Studies of positive interaction among humans and animals of the same species stated that phenylethylamine could be an additional physiological indicator for such behaviour
The method was to use a decrease in blood pressure of between 510% from baseline values as parameter, to measure changes in plasma phenylethylamine during positive interaction between humans (n = 18) and dogs (n = 18)
Summary
Physiological parameters for positive human-companion animal behaviour have been few and limited to changes in humans only. Studies of positive interaction among humans and animals of the same species stated that phenylethylamine could be an additional physiological indicator for such behaviour. Results indicated that phenylacetic acid, catabolite of β-phenylethylamine, increased significantly (p < 0.05) in both species after interspecies interaction that lasted between 5-24 minutes If this physiological reaction is mutual, animals used in animal-facilitated therapy can experience the same benefits from such reactions as humans and this is of importance from an animal welfare point of view. Fisher (1992) said that attraction (the beginning of positive interaction) might begin with a small molecule, called phenylethylamine, which has an amphetamine-like effect It is known as the excitant amine, causing feelings of elation, exhilaration and euphoria. Phenylethylamine has positive effects on non-humans too, according to behaviour described in mice and Rhesus monkeys
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