The overall research aim of this study is to investigate changes in measures related to the risk of falls among elderly with dementia participating in animal-assisted interventions. Also relatives' experience of own and the elderly's situation during and after the intervention will be examined. The design will be a prospective and cluster randomized multicenter trial, but mixed-methods will be used to target different outcomes. The study population will be elderly (age above 65) at day care centers diagnosed with dementia, or having a cognitive deficit. The intervention will consist of 30 minutes sessions with animal-assisted activity or animal-assisted therapy two times a week for 12 weeks in groups of 4-6 participants. Control groups will receive treatment as usual. Research questions: