As our dogs get older, they become more prone to more health problems and conditions than when they were young pups. There are many causes of hind leg weakness in dogs and the exact cause is hard to discover, even for vets.
The history of the Bernese Mountain Dog is that it was a farm dog of the midland regions of Switzerland. They were primary used as a companion and watchdog to farmers and their families. These beautiful-looking Swiss farm dogs takes his name from the area of Bern, where he likely originated.