Table 1. Details of the data subsets for Study 1 at each stage of data cleaning.

Sex	Neuter Groupa	Cleaning Stage
		Dataset Creation	Removal of Extreme Outliers	Population Level Cleaning	Removal of Duplicate Observations	Within-Cat Cleaning	FINAL DATA
M	1 (up to 0.39y)	3,541 rows 775 cats	3,541 rows 775 cats	3,492 rows 774 cats	3,490 rows 774 cats	3,039 rows 712 cats	3,039 rows 712 cats
	2 (0.39–0.44y)	7,875 rows 2,641 cats	7,876 rows 2,641 cats	7,695 rows 2,605 cats	7,689 rows 2,605 cats	5,961 rows 2,141 cats	5,961 rows 2,141 cats
	3 (0.44–0.54y)	9,064 rows 3,038 cats	9,063 rows 3,038 cats	8,862 rows 2,995 cats	8,855 rows 2,995 cats	6,863 rows 2,453 cats	6,863 rows 2,453 cats
	4 (over 0.54y)	10,149 rows 3,888 cats	10,148 rows 3,888 cats	9,925 rows 3,825 cats	9,916 rows 3,825 cats	7,198 rows 3,007 cats	7,198 rows 3,007 cats
F	1 (up to 0.40y)	4,780 rows 1,032 cats	4,779 rows 1,032 cats	4,692 rows 1,029 cats	4,687 rows 1,029 cats	4,061 rows 952 cats	4,061 rows 952 cats
	2 (0.40–0.48y)	10,625 rows 3,319 cats	10,622 rows 3,319 cats	10,324 rows 3,267 cats	10,310 rows 3,267 cats	7,987 rows 2,662 cats	7,987 rows 2,662 cats
	3 (0.48–0.56y)	11,091 rows 3,789 cats	11,090 rows 3,789 cats	10,730 rows 3,712 cats	10,772 rows 3,712 cats	8,061 rows 3,010 cats	8,061 rows 3,010 cats
	4 (over 0.56y)	13,123 rows 4,870 cats	13,122 rows 4,870 cats	12,729 rows 4,782 cats	12,719 rows 4,782 cats	9,281 rows 3,785 cats	9,281 rows 3,785 cats

^a Since each neuter group contains data for sexually intact individuals up to the lower end of the neuter age range, the neuter groups are not disjoint.