This article is from the Canine Medical Information FAQ, by Cindy Tittle Moore with numerous contributions by others.
Also called pano, this is an inflammation of the membrane covering the
bone and is relatively common. Rest, quiet, and sometimes a
vet-approved painkiller are generally recommended for the puppy. Some
vets recommend a reduced protien (usually an adult mixture) diet. This
can strike anytime between 6-18 months of age and rarely lasts past
two years of age.
If the limping goes from leg to leg (i.e., one day the dog limps on
the right rear leg and the next it limps on the left front), it is
very likely pano. Pano can also be diagnosed via x-rays.
Fortunately, lasting effects are uncommon, and most puppies outgrow
it. It is not known what causes pano, the belief is that there is
either a hereditary link, perhaps just a predisposition toward,