The Appenzeller Sennenhund is a medium-sized mountain dog, 18.5-23 ins (47–58 cm) at the withers and weighing 49-71 lbs (22–32 kg). Like the other Sennenhunds, the Appenzeller Sennenhund has a heavy, molosser-like build and a distinctive tricolour coat. The breed’s ears are small and triangular, set high and hanging down against the dog’s cheeks, similar to a button ear. Faults in the breed’s appearance include wall eye, kinked tail, a single coat, and a coat that is not tricolour.

As with all medium to large, very active working dogs, the Appenzeller Sennenhund should be well socialized early in life with other dogs and people and provided with regular activity and training if they are to be safely kept as a pet. If trained properly, they bond closely with their owners and like to seek for attention. As a result of careful regulated breeding, the Appenzeller breed, as a whole, though individual genetic lines vary, is an extremely healthy breed. Especially for a dog of its size and weight. According to the breed standard, the Appenzeller Sennenhund are lively, high spirited, athletic and suspicious of strangers. Due to his large size and high energy levels, the Appenzeller Sennenhund is not recommended as an apartment dog.