Whether some animals are better suited than others to achieve specific purposes is still somewhat difficult to substantiate, but there is lots of gathered experience. "Generally speaking, all farm animals, meaning all animals in close contact with human beings are basically suited for this purpose," says Wohlfarth. Aside from dogs, who are perhaps the most frequently used animals, Wohlfarth talks about colleagues who work with llamas and alpacas, for example. Time and again, donkeys, sheep or pigs are also being used. Physiotherapist Daan Vermeulen and his pig Felix primarily work with people with dementia for example. "The choice of animal clearly also depends on the therapist’s personal preference." It’s becoming more and more common that therapists keep several animals like on a farm, allowing clients to determine which animal they prefer.
Dogs are very popular pets and that’s why many prefer to use them. However, dogs are not automatically always the right choice. You might have clients where an alpaca is the better alternative. For example, if clients don’t want to get too close to an animal and first need to work on wanting closer contact. "However, there is generally still insufficient available knowledge to determine whether and what types of animals are best suited for certain therapeutic goals," says Wohlfarth. "Right now, there are more hands-on experiences than scientific studies to prove effectiveness."
Wohlfarth adds that there has essentially been no research conducted in Germany and German-speaking countries. He says there are some isolated initiatives but only the National Institute of Health in the U.S. is currently actively conducting research. "That’s why for the most part, we have a high level of empirical evidence showing that animal-assisted therapy approaches may be effective," says Wohlfarth. "But here again we face a problem: if things work in speech therapy, for example, do they also work in occupational therapy and other professions?" According to Wohlfarth, currently available studies primarily come from the very research-oriented field of physical therapy. In addition, there are several basic investigations that prove that animals are able to reduce levels of stress and anxiety for instance. "That’s why you can conclude that this is an effective mechanism that should technically apply to all areas," Wohlfarth sums up.