This study compares police investigative interviews conducted in the presence of a service dog (n = 46) to those without (n = 45) to examine the effects of the presence of and interactions with a dog on children’s stress and fatigue/inattention levels. The interviews were conducted with children aged 3 to 15 years and were coded for signs of children’s stress and fatigue/inattention, dog-child physical interactions, and children’s comments about the dog. Dog presence did not correlate with child stress and fatigue/inattention. Among children accompanied by a dog, the odds of expressing signs of stress and fatigue/inattention were significantly greater with increased frequency of verbal interactions and duration of dog-child physical interaction. The odds of children expressing signs of fatigue/inattention were significantly greater with increased frequency of dog-related verbalizations and dog-child physical interaction. Strengths, limitations, and future directions are discussed. [ABSTRACT FROM AUTHOR]