Then the Boxby Functional Joint & Mobility is the right choice for that sweet four-legged friend of yours. It is recommended to go to the vet to diagnose the problem before giving these snacks. In general, about 30 to 50% of dogs in the Netherlands will have to deal with osteoarthritis at some point in their lives. This is usually caused by underlying problems, such as elbow or hip dysplasia, broken bones or torn muscles/tendons.