Table 1.

Main behavioural changes caused by stress (adapted from Rochlitz ⁷⁰ and Amat et al ²⁷ )

Behaviour	Changes caused by stress
Feed intake	Usually decreases but may increase in some circumstances
Grooming	Usually increases but may decrease in some circumstances
General activity	Decreases
Play	Decreases
Exploratory behaviour	Decreases
Facial marking	Decreases
Positive interactions with other cats and with humans	Decrease
Vocalisation	Increases
Vigilance	Increases
Hiding	Increases
Urine spraying	Increases
Aggressive behaviour	Increases, particularly redirected aggression and some forms of affective aggression
Compulsive behaviours	Increase (compulsive behaviours will not develop in healthy cats in an optimal environment)