Table 1. Dietary history of the 28 Labrador Retriever dogs included in the study^a.

Dietary history	Lean dogs	Overweight dogs
	BCS (4–5)	BCS (6–8)
Frequency of scraps, treats and chewsb	6 (4.5–7)	6 (3.5–7)
pooled scores, median (interquartile range)
Daily energy intake from commercial dietc	2:10	2:14
(n75%:n100%)
Commercial diet (nwet:ndry)d	1:11	0:16

^aSummary of the background diet received by the dogs in their home environment. Body condition score (BCS) was evaluated by the same veterinarian (JS) and the dogs were divided into lean (n = 12) and overweight (n = 16) groups.

^bThe frequencies with which dogs were given table scraps and rewarded with training treats and dog chews were scored separately as follows: 0 (never),1 (once a month), 2 (1–3 times per week), 3 (daily). Scores for scraps, treats and chews were then pooled for each dog and the median (interquartile range) for the lean and overweight groups was calculated. The Mann-Whitney U test revealed no significant differences in total scores between BCS groups (P = 0.79).

^cThe proportion (%) of total daily energy intake coming from a commercial complete diet was estimated by the dog owner.

^dNumber of dogs fed wet or dry commercial diet in the home environment.