how can I deter 4 month old kittens from feeding from mother?

Your vet can probably give you something for her that will dry up the milk, and then you have her spayed. Usually, the mother is driving her kittens away, preparing for the next litter.

But the kittens like the free meal, and she obliges. Tough combination to break.

Put the kittens in one room, mom in another. Then schedule her to be spayed. And the kittens also should be neutered/spayed before they breed each other. Kittens as young as 4 months old can breed.

Never give the kittens cow's milk to drink. They should be on high quality dry and canned kitten food for at least another month. NO milk.

I have a mother cat and her 7-year-old "baby" and she STILL tries to nurse on her mom! Sometimes the mom will kick her or bite her when she does it but usually she just lets her. I don't really know if your kittens are too old to be nursing (I know mine is though!), but I guess you can place a blanket or something over the mother's belly so the kittens can't nurse and then offer them kitten food so they get the hint.

Hope you have better luck than me!!

take a small dish i usually use a plastic cover for Tupperware. warm up a small amount of milk luke warm. put the milk in the cover near the kittens. you take each kitten separately and push there mouth in the milk ( not too much to don't want to get it up there nose) so they can get a taste for it do it often when they eat and soon it will wean them off there mother

the mother cat often senses when her kittens are ready to stop nursing from the mother!

she may sense that some or all are not ready as of yet to be weined i wouldnt worry let the mother do what she knows is right for the kittens

you have too keep your kittens away from there mother try this.

when the kittens want to go outside- take the kittens out but leave the mother inside

if the kittens want to drink milk-don't give them there mothers milk instead feed them regular milk and if they still won't drink it push there heads and face towards the milk if milk gets on there face just clean it up with a soft towel and keep feeding them :)

Let her decide to stop feeding the kittens on her own, don't try to force human opinion on her and let nature do what it has programmed her to do biologically.