Snack 21 really has a good thing going with all their dehydrated fishy chews.We've been trying the different varieties as I come across them. Bestbullysticks.com sells them!
From their website:
Salmon Skin RollsAn alternative to rawhide and a natural source of Omega-3 fatty acids with
no digestion issues. Made of 100% dried Wild Pacific Salmon skin, the chews
contain no additives, preservatives, colors or artificial flavours, and are ideal for use
with rubber treat toys.