Graduate work aims to provide a comprehensive insight into the therapeutic procedures that contribute to the effective implementation of the dog assisted therapy for people with developmental disabilities, with special emphasis on people with autism spectrum disorder (ASD) and attention deficit/hyperactivity disorder (ADHD). The fundamental problem question of this paper is whether the results indicate sufficient efficiency of the dog assisted therapy on the communication of persons with developmental disabilities. Graduate work is based on an analysis of various interdisciplinary studies that focus the creation of a special therapeutic environment for people with ASD and ADHD, using a therapeutic dog as a help to improve quality of life and the communication skills of persons with these difficulties. The relationship between the child and the dog largely determines course of their communications. It is important that the approach and method of working with a child and a therapeutic dog is designed and directed towards the specific needs of each child. The analysis of the available literature showed that dog assisted therapy and its effects on communication with people with developmental disabilities, particularly people with ASD and ADHD is not yet fully investigated. We point to the need for further quantitative researches, because using them would make possible a better generalization of existing qualitative researches. The paper concludes that in the certain cases, dogs should be involved in the therapy, and that the efforts to develop methodologies for their therapeutic use is extremely valuable. The conclusion emphasizes the need of additional development of planned and controlled process in which dogs are included in therapeutic interactions.