Table 1. Reported swimming frequency in all dogs, spot-on treated dogs, non spot-on treated dogs and collar treated dogs.

Swimming frequency	All dogs		Spot-on treated		Non spot-on treated		Collar treated
	n	%	n	%	n	%	n	%
Every week or more	142	23.8	40	17.9	102	27.4	10	37
Every 2 weeks	57	9.6	16	7.1	41	11	2	7.4
Every month	67	11.2	25	11.2	42	11.3	3	11.1
Every 3 months	40	6.7	13	5.8	27	7.3	2	7.4
Every 6 months	35	5.9	14	6.2	21	5.6	2	7.4
Once a year or less	255	42.8	116	51.8	139	37.4	8	29.6
Total	596	100	224	100	372	100	27	100

Notes.

n

number of responses to the question “How often does your dog enter into or swim in lakes or rivers?”.

%

percentage of responses