I wouldn't recommend it...kittens need the specific nutrition from their mother's milk (or specialized formula), and adult cats have lost their lactose tolerance.
I know--the image of a cat lapping at a bowl of milk has become so memetic! And, in the olden days where milk was a luxury, giving your vermin-killing cat a tiny bit of cream as positive reinforcement or to earn its loyalty was a safe bet. But I've seen people who think their cat can subsist on milk, and then don't understand why it gets sickly and malnourished, since it always drinks the whole bowl.
It's like humans with snacks and soda: they taste good and we love them, even though they're absolutely no good for us and fail to provide any real nutrients.
ons is used for het words, whereas onze is used for plurals and de woorden. Het huis, ons huis = our house De huizen, onze huizen = our houses De kat, onze kat = our cat
ons also means "us"
just as in English 'us' and 'our' (possession) e.g. "onze kat kijkt naar ons" = our cat looks at us
What happened to the word poez in stead of kat in Dutch. That is how it was always said in Dutch