Usually the motivation for the jumping up behavior is to greet people. Many dogs like to greet “face to face,” like they do with their canine counterparts. Some people, however, find this objectionable. Dogs that jump up can also cause injury or scare the visitor.
Is it bad for dogs to jump up?
When a dog constantly jumps up and down, it increased the wear and tear of their joints; thus, placing them at a greater risk for developing arthritis and similar conditions of the joints.
Should dogs be allowed to jump?
Although jumping increases the load on the joint, if the surfaces and heights are within a safe range, your dog is healthy, and you don't overdo it, jumping is relatively safe.