Table 2. Telephone calls to random representatives of target populations.

These were performed for qualitative assessment of non-responders, as part of the non-response analysis.

	No answer	Already answered questionnaire	Don’t work with / own dog	Declined to participate	Answered reduced questionnaire
Veterinarians (n = 296)	203 *	19	21	7	46
Dog owners (n = 296)	189	10	14	11	72

* 97 of these had international or inactive telephone numbers.