<My cat loves milk - but it gives her an allergic
 reaction. She gets an asthma attack - coughing and wheezing. She is
obviously
 uncomfortable and it obviously does her no good. But when the fridge door
 opens and the cat sees the milk she goes wild with excitement. In short she
is
 addicted to it. >

My observations were:
1. both cat and kittens took to the milkand cheese as if it had always been
part of their diet.
2. they suffered no ill effects, unlike with the pasteurised mik.
3. they did not show any unusual excitement over it.
4. they did not crave it, since they often left some milk undrunk or cheese
uneaten.
5. every other aspect of their lives was well tuned.
the cat was half feral and looking for a place to give birth.

Ayurveda has a point to make about all this:  through divine mercy the cow
was given an abundance of milk
so humans could drink of it without depriving the new-born calf.
makes sense to me.
Just about all cultures use dairy, but as Frank points out the fermented
products like kefir
are a big standout.  Fermentation would denature any IGF factors if someone
is concerned
about cancer.

Andrew