Drain the canned salmon and place into a food processor. Add the water and blend until the salmon forms a thick paste. If the mixture is too thick, add water, one tablespoon at a time, until the salmon is puréed.
Add the salmon paste to a bowl and add the flour. Mix well until you can form a ball with the dough.
Place the dough onto a clean work surface lined with parchment paper and roll out to ¼-inch-thick.
Cut out the dough into 1-inch circles using a round cookie cutter.
Place the dough circles evenly between the COSORI Food Dehydrator trays.
Set temperature to145°F and time to 4 hours, then press Start/Stop.
Remove the treats when done and crispy and crunchy. Cool completely, then serve to your pet.