Ideal for Kong fillers.
Boil a sweet potato and mash with the skinned mackerel. Remove any bones.
Fill into ice cube trays and defrost them the day before.
They will keep in the freezer for 3 months and fridge for 3 days.
If you want to use the biscuits for clicker training just cut them really small and bake them less long.
All recipes approved by Zoe the dog!