Table 1.

List of questions and answer categories presented in the questionnaire survey directed at livestock drivers in order to describe the experiences and opinions regarding fitness for transport and management choices relevant for animal welfare in Danish livestock drivers transporting cull sows to slaughter

	Question	Answer categories
1	Age
2	Sex
3	For how many years have you been transporting sows?	<1 yr 1–5 yr 6–10 yr >10 yr
4	When did you receive the required transports certificate?	<1 yr 1–5 yr 6–10 yr >10 yr
5	How many sows did you bring to the slaughterhouse today?
6	How many loads of sows do you transport to the slaughterhouse per week?
7	How often do you reject cull sows that have been selected for slaughter by the herd manager?	A) Several per month B) Several per yr C) Max 1 per yr D) Less than 1 per yr E) Never
8	What is the typical reason for rejecting a sow?
9	When in doubt about fitness for transport—what is the reason for experiencing doubt?
10 N = 23	What factors are important when you decide whether a sow is fit for transport?	A) Risk of fine B) Sow welfare C) Can’t separate her from rest D) Time E) Other
11	Do you experience problems when the sows are loaded into the truck, and if so: which problems?
12 N = 23	How often have you experienced that the veterinarian at the slaughterhouse has rejected the sow due to lack of fitness for transport?	Same categories as no. 7
13 N = 23	What was the problem the last time that you transported a sow that got rejected?
14	How can the weather affect the welfare of the sows during transport to the slaughterhouse?
15 N = 24	How often do you transport sows under special conditions (isolated from the rest, more bedding)?	A) Daily B) Several per week C) 1 per week D) 1 per 2 wk E) 1 per month F) More seldom G) Never
16	Which cull sows do you think would benefit from being transported under special conditions?
17 N = 23	Does your workload increase, when the sows are transported under special conditions?	A) No B) A little C) Some D) A lot
18 N = 23	Does the rules about resting periods and driving affect the welfare of the sows?	Yes/no
19	Have you ever violated the rules about resting periods out of consideration for the sows on the truck	Yes/no
20 N = 23	Which of the listed factors do you believe to be most stressful for the sows during transportation?	A) High temperature B) Low temperature C) Long duration (number of hours not specified) D) Small roads, curves, bumps E) Stationary truck F) Other
21	Do you adjust the air intake for the sows during transports	Same categories as no. 15
22 N = 22	How often do you mix sows from more herds in the same section of the truck?	Same categories as no. 15
23	For how long do you typically wait to unload sows after arriving at the slaughterhouse?	<10 min 10–30 min 31–60 min >1 h

The number of respondents is 25, unless otherwise stated.