Medium sized dogs are a great choice If a big dog is just too big and the little dogs are just too small for you, then you may want to consider getting one. English shepherd- http://encyclopediaofdogbreeds.com/medium-dog-breeds/
Nova Scotia Duck Tolling Retriever - very smart, trainable, medium-sized dog with a hardy winter coat for rough weather conditions. Mt. Hood Meadows is training their new pup as an avalanche search and rescue guide.
Staffordshire Bull Terrier is a medium sized English dog breed.Staffordshire Terriers are loyal,intelligent and fearless dogs.Stafforshire Bull Terriers with their loving and cheerful personalities are ranked as 2nd best dog breed for people suffering from anxiety.