The macro "Food" for "Scum" can be downloaded and used on regular mouse and keyboard. Installing the macro is in the Keyran program and increases your skill level in Scum, if you follow the instructions!
Put the milk in quick button 4 and the tuna in button 5. If everything is successful, your character will be fed every 20 minutes. This macro should be combined with «Power+Endurance + Agility+Stealth + durability.»