@Wombat Start mixing boiled and cooled rolled oats that have been boiled in Bonox,boil also in same pot some carrots,beans and peas, add a little lean mince, add some bran,,,you can blend it up,or not,,its the same same as the expensive dog suasages ...
Also, give then a bit of cheese,every so often,and a saucer of Butter Milk
