Quote:
Originally Posted by
jennyranson 
I think natural (by which I assume you mean raw or unpasteurised, which is illegal to sell in many places) cows milk
is very high in lactose, which is hte substance that many, but not all, cats are sensitive to, and can certainly upset the stomachs of small kittens. All processing of milk reduces the lactose, which is a kind of sugar.
Yes, of course. My theory is, there is something in raw milk, perhaps some enzyme, which goes destroyed at pasteurizing. Why otherwise the ancient old custom to give cats milk directly from the cow, and they are happy and thriewing? It may be so cats who didnt managed this perished. But it may be so raw cow milk is more OK for cats than pasteurized.
Some cats do manage pasteurized too, but not all...
And processed milk, ie, youghurt etc, is clearly better than "milk". Precisely as you say. So if you want to give your cat cow milk, the recommendadion will be low lactose milk or yoghurt/similiar....
When I earlier said processed meaning pasteurized and standarderized I was a little unclear.