Basset Hounds have more bone per pound than any other dog. As a result, like some other large breeds, Basset Hounds are particularly prone to PANOSTEITIS, or growing pains. Though it's best to get a vet's opinion, unfortunately many are not familiar with panosteitis. As a result, too many times people out there are wrongfully told "it must be some form of dysplasia," if the vet has no real answer for the limping..
If you find your own puppy dealing with this ailment, we have been here before. We have managed with buffered aspirin, and time. If this is what they are dealing with, they will grow out of it much like our human teenagers ;)
It does seem to effect the heavier European Bassets even more, likely because of the larger bone density that runs in their genes.
*** Below, are some links we've found very helpful on this subject: