The male Fox terrier is tame but it will also respond to your commands. Shoulder height of a male Smooth Fox Terrier should be no taller than 15.5" with females proportionally less, and a male in show condition should weigh approximately 18 lbs.
Temperament:
Smooth Fox Terriers make excellent family pets. Because this is an intelligent and active breed, they must be kept exercised, and interested, and a part of the family. They are affectionate and playful. They have well-developed hunting instincts. Left to their own devices and deprived of human companionship, undesirable behaviour may be exhibited, including chasing of small animals, or escaping if ignored.
The Smooth Fox Terrier generally lives 12 to 15 years, and can live as long as 19 years.The breed is genetically quite healthy. Some known health problems are deafness, luxating patellas and a variety of eye disorders such as lens luxation, distichiasis, and cataracts. Skeletal problems that can occur include Legge-Perthes disease and shoulder dislocations. Myasthenia Gravis and idiopathic epilepsy have also been reported, as well as goiter.