weird but interesting question...

why do grown dogs get stomachaches when they drink milk and grown cats
dont?.
It is known that lack of lactase, the enzyme that breaks down lactose,
produces stomachahces in humans. The other thing is that when puppies
drink milk nothing happens to them, but as they grow older and stop
producing the enzyme, they get stomachaches. The same hapens with
cats, so why dont they get stomachaches as they also lack the enzyme?
I would appreciate any kind of help/guidance on this topic. PLease,
prove me wrong if i am!
Thank you before hand.

Yuri Sylvester

ps: i couldnt find any vet group so i guessed pathology would have
some explanation for this =)