Table 1—

Owner-reported demographics for dogs in the Dog Aging Project Pack that, at the time of the release of these data, were either alive (n = 33,168) or reported in an owner-completed End of Life Survey as having been euthanized (2,195) or having had unassisted death (375). In each demographic category, groups of dogs are reported as number (percent within that column for that category).

	Euthanized (n = 2,195)	Unassisted death (n = 375)	All dogs (n = 33,168)
Characteristic	No. of dogs (% of euthanized dogs)	No. of dogs (% of dogs with unassisted death)	No. of dogs (% of total dogs)
Age at death
< 1 y	0 (0.0%)	0 (0.0%)	—
1–< 2 y	3 (0.1%)	4 (1.1%)	—
2–< 3 y	8 (0.4%)	6 (1.6%)	—
3–< 5 y	24 (1.1%)	10 (2.7%)	—
6–< 7 y	45 (2.1%)	7 (1.9%)	—
8–< 9 y	92 (4.2%)	23 (6.1%)	—
10–< 11 y	244 (11.1%)	50 (13.3%)	—
11–< 13 y	508 (23.1%)	79 (21.1%)	—
13–< 15 y	662 (30.2%)	112 (21.9%)	—
15–< 17 y	467 (21.3%)	65 (17.3%)	—
≥ 17 years	141 (6.4%)	18 (4.8%)	—
N/A	1 (< 0.1%)	1 (0.3%)	—
Life stage at death
Puppy	2 (0.1%)	1 (0.3%)	—
Juvenile	11 (0.5%)	9 (2.4%)	—
Adult	415 (18.9%)	95 (25.3%)	—
Senior	1,766 (80.5%)	269 (71.7%)	—
Sex
Male, neutered	1,063 (48.4%)	174 (46.4%)	14,808 (44.6%)
Male, intact	53 (2.4%)	21 (5.6%)	1,906 (5.7%)
Female, spayed	1,069 (48.7%)	168 (44.8%)	15,310 (46.2%)
Female, intact	10 (0.5%)	12 (3.2%)	1,148 (3.5%)
Breed classification
AKC-recognized purebred	1,166 (53.1%)	228 (60.8%)	16,619 (50.1%)
Non–AKC-recognized purebred, F1 hybrid, or mixed breed	1,029 (46.9%)	147 (39.2%)	16,553 (49.9%)
Dog weight class
0–4.9 kg	117 (5.3%)	29 (7.7%)	2,457 (7.4%)
5–9.9 kg	335 (15.3%)	87 (23.2%)	5,316 (16.0%)
10–14.9 kg	203 (9.2%)	34 (9.1%)	3,228 (9.8%)
15–19.9 kg	200 (9.1%)	26 (6.9%)	3,332 (10.0%)
20–24.9 kg	343 (15.6%)	34 (9.1%)	5,009 (15.1%)
25–29.9 kg	307 (14.0%)	56 (14.9%)	4,669 (14.1%)
30–34.9 kg	306 (13.9%)	40 (10.7%)	3,885 (11.6%)
35–39.9 kg	187 (8.5%)	32 (8.5%)	2,329 (7.0%)
40–44.9 kg	84 (3.8%)	16 (4.3%)	1,329 (4.0%)
≥ 45 kg	113 (5.1%)	21 (5.6%)	1,638 (4.9%)

AKC = American Kennel Club.