Table 1.

GLMM analysis of the factors affecting the owners’ reports regarding whether they thought that their dogs had eaten the food.

	Wald statistic	df	P
Full model
Action (Eaten, Not Eaten)	0.00	1	>.999
Presence of food (Replaced, Not Replaced)	0.00	1	>0.999
Action * Presence of food	2.60	1	0.111

Data were fitted using a binomial distribution with a logit-link function. Experimenter identity was fitted as a random term (estimated variance component for subject in the minimal model = 0.168, SE = 0.243). Estimated dispersion parameter: 0.154.