Frist you need to preheat the oven to 350 degree Farhenheit.
Next using the mixing bowl combine the flour, canned fish and peanut butter.
Mix the dough until it gets a soft texture.
Now roll out the dough on lightly floured surface to a thickness of 1/4 inch.
Cut the dough into small pieces, and place them on a baking sheet.
Bake until the treats get golden brown on the outside.
Let the treat cool down. Once it does it is ready for serving.
Store the remaining treats in your freezer or fridge.
Notes
There are chances that your cat may have allergies to certain ingredients. So, make sure you consult the vet before serving any homemade treats to your cat.