Simple SummaryOwners’ understanding of dog behaviour influences dog welfare. This study explored owners’ experiences and perceptions of dog behaviour. Data came from an ongoing UK/ROI study of dogs. Survey questions when dogs were 12/16 weeks (data combined), 6, 12, 18 and 24 months were analysed. Data were explored with two approaches: (1) qualitative thematic analysis and (2) quantitative text analysis. Responses to ‘other information’ questions and those regarding owner-reported problem behaviours were explored to understand owners’ experiences/understanding of dog behaviour (1). Responses to the ‘other information’ questions were evaluated to understand how sentiment in the text and in word use changes over time (2). The proportion of positive: negative sentiments increased with the dog’s age. At the first time point, ‘bite’ was the most common word, later replaced by words related to ‘love’. Owners referred to the ‘dog’s biology’, ‘personality/deliberate action’ and ‘external influences’ when explaining dogs’ behaviour. Problematic behaviours of young dogs were seen as ‘mischievous’, unintentional and context-specific. Similar behaviours shown by older dogs were described as ‘deliberate’. Both positive and negative experiences of dog ownership were identified. Free-text survey responses are a useful resource for exploring data but should be interpreted cautiously, as not all respondents answer these questions.AbstractOwners’ understanding of dog behaviour influences dog welfare. This study aimed to investigate owners’ experiences of living with dogs and perceptions of dog behaviour/behaviour change. Data from an ongoing UK/ROI longitudinal study of dogs were used. Open-ended survey data (n= 3577 comments,n= 1808 dogs) when dogs were 12/16 weeks (data combined), 6, 12, 18 and 24 months were analysed to cover the dog’s puppyhood/adolescence. To evaluate the usefulness of open-ended survey questions, both quantitative textual and qualitative thematic analyses were employed. Textual analysis identified an overall positive sentiment at all timepoints; the proportion of positive: negative sentiments increased with the dog’s age. Words related to ‘love’ were the most frequent descriptors at all but the first timepoint, when ‘bite’ was the most frequent descriptor. Qualitative analysis helped to identify that owners attribute dog behaviour to ‘Dog’s biology’, ‘Personality/deliberate action’ and ‘External influences’. Analysis of open-ended survey responses helped to identify changes in perception over time. When dogs were young, owners described problematic behaviours as ‘mischievous’, unintentional and context-specific. Similar behaviours shown by older dogs were seen as ‘deliberate’. Both positive and negative experiences of dog ownership were identified. However, as not all respondents answered open-ended questions, the generalisability of our findings is limited.