A practical German-language guide to keeping fancy mice (*Farbmäuse*) as companion animals. The book addresses the core responsibilities of small-animal ownership, including suitable housing, daily care routines, feeding, and health management. It is intended for owners who need clear, usable guidance on creating appropriate living conditions, meeting nutritional needs, recognizing signs of illness, and maintaining welfare throughout a mouse’s life. Rather than a general animal encyclopedia, the work focuses on husbandry practices and preventative care, making it a compact reference for responsible pet keeping. Its emphasis on health, nutrition, and routine maintenance suggests a useful role for both new owners and experienced keepers seeking a structured overview of mouse care.