I don't quite understand.
Are they little bump type things, or are they the whole general fetlock joint area?
Some pictures on google look like it (the ones where the whole area looks puffy - not just the little bumps). Pro's feel squishy and look kinda puffy. But how would the hock area fit into it?
They can be little bumps or they can affect almost the whole fetlock area. They can appear in the hocks as well (those are called 'boggy' or 'spongy' hocks).
The wind puffs themselves are usually harmless, but they indicate excessive joint strain so care should be taken to prevent future problems such as arthritis, tendinitis, etc.