Table 1.

Descriptive statistics for yawn duration and brain and body weights

Breed (alphabetical order)	Dog N	Mean ± SD yawn duration (s)	Maximum yawn duration (s)	Mean brain weight (g)	Mean body weight (kg)
Beaglea	11	2.35 ± 0.49	3.28	79.66	12.79
Boston Terriera	12	1.67 ± 0.28	2.09	73.22	9.41
Boxera	12	2.20 ± 0.39	3.00	98.95	28.16
Bulldoga	11	1.84 ± 0.32	2.45	94.78	24.08
Chihuahuaa	9	1.58 ± 0.44	2.17	55.10	3.35
Cocker Spaniela	3	1.88 ± 0.34	2.25	77.76	11.72
Colliea	5	2.03 ± 0.43	2.56	98.91	28.12
Dachshunda	12	1.78 ± 0.30	2.24	68.03	7.20
Doberman Pinschera	9	2.14 ± 0.74	3.27	104.01	33.77
German Shepherda	11	2.59 ± 0.73	3.97	104.63	34.50
Golden Retrievera	12	2.25 ± 0.65	3.72	101.63	31.04
Great Danea	12	2.31 ± 0.43	2.94	120.54	57.75
Labrador Retrievera	12	2.21 ± 0.46	3.00	102.12	31.59
Miniature Poodlea	8	1.70 ± 0.46	2.72	67.54	7.02
Miniature Schnauzera	6	1.88 ± 0.33	2.48	69.76	7.89
Old English Sheepdogb	3	2.47 ± 0.86	3.40	104.40	38.60
Pekingeseb	6	1.43 ± 0.39	2.11	53.40	4.90
Puga	11	1.72 ± 0.30	2.20	71.85	8.79
Standard Poodlea	4	2.29 ± 1.09	3.90	92.53	22.06
Standard Schnauzera	4	2.20 ± 0.45	2.66	84.09	15.58
Toy Fox Terrierb	3	1.52 ± 0.72	2.34	52.30	3.40
Toy Poodleb	12	1.76 ± 0.31	2.40	59.10	3.20
Weimaranera	10	2.83 ± 0.64	3.64	101.33	30.71

Note: Brain and body weight data obtained from

^a Horschler et al. (2019) and

^b Bronson (1979).