Table 1.

Final QoL‐associated questionnaire showing 7 themes with Cronbach's alpha values above 0.7 indicating a good internal consistency and reliability

QoL‐Associated Questionnaire Themes and Questions	Cronbach's Alpha per Theme (scale dimension per question)
1. Seizure severity and frequency	CA: 0.85
1. In the last 3 months, the frequency of the fits in my dog was acceptable	1–5 (strongly agree–strongly disagree)
2. In the last 3 months, the severity of the fits in my dog was acceptable
3. In the last 3 months, overall, the fits in my dog are managed successfully
4. Overall, how severe were your dog's fits in the past 3 months?	1–7 (very mild–very severe)
2. Adverse effects of AED	CA: 0.77
1. In the past 3 months, the adverse effects of the medication to control the fits in my dog were acceptable	1–5 (strongly agree–strongly disagree)
In the past 3 months, how severe was the following adverse effect:
2. Eating more/would like to eat more	1–5a (very mild–very severe)
3. Gaining weight
4. Drinking more
5. Urinating more
6. Sleeping more than before
7. Wobbly/not coordinated when walking
8. Restlessness/pacing
9. Itchiness or skin rash
10. Vomiting
11. Diarrhea
12. Coughing
6. Restrictions on the carer's life (related to caring for a dog with IE)	CA: 0.71
1. In the past 3 months, how often did you feel that your dog's epilepsy caused conflict with your work, education, or day‐to‐day activities?	1–5 (never–very often)
2. In the past 3 months, how often did you feel that your dog's epilepsy limited your social life?
3. In the past 3 months, how often did you feel that your dog's epilepsy limited your independence?
8. Frustrations over caring for a dog with IE	CA: 0.93
1. My limitations in work, education or day‐to‐day activities because of my dog's fits	1–5 (not at all bothersome–extremely bothersome)
2. My social limitations because of my dog's fits
3. Overall, the limitations on my life caring for my epileptic dog
9. Owner distaste of AED adverse effects	CA: 0.79
1. How bothersome are the physical effects of the medication on my dog?	1–5a (not at all bothersome–extremely bothersome)
2. How bothersome are the mental effects of the medication on my dog?
In the past 3 months, how much did you dislike the following adverse effects:
3. Eating more/would like to eat more	1–5a (not at all–a lot)
4. Gaining weight
5. Drinking more
6. Urinating more
7. Sleeping more than before
8. Wobbly/not coordinated when walking
9. Restlessness/pacing
10. Coughing
10. Carer anxiety around the seizure event (and its effects on the dog)	CA: 0.89
1. In the last 3 months, I worried about the frequency of the fits in my dog	1–5 (strongly disagree–strongly agree)
2. In the last 3 months, I worried about the severity of the fits in my dog
12. Perceptions of rectal diazepam use	CA: 0.78
1. Have you ever been uncertain when to give rectal diazepam?	1–5a (never–always)
2. Have you ever been worried how much or how often you are supposed to give rectal diazepam

CA, Cronbach's alpha; IE, idiopathic epilepsy.

Additional tick box: adverse effect not present.

^aAdditional tick box: not applicable.