Hardly any milk :-(

[hulligwen]

I'm trying to transition baby from formula to combination.
But I'm hardly producing any milk and he latches but quickly gets frustrated.
I have a pump but can only make an ounce tops. What can I do? Is it too late?
He's 4 weeks old.

He may be used to the flow of a bottle which will almost certainly be faster and require less effort than your boobs.

I don’t know if you are already but if you’re not then I’d start paces feeding, have a Google to see how it’s done, that’ll make them work a little harder like at the breast.

Have you not fed him at the breast at all for those 4 weeks?

An ounce is good, mornings you’ll probably pump more, and if you’re well rested and calm it’ll help too.

Lots of skin to skin and just let DC latch on whenever possible; would a few days in bed with them just on/by you be possible?

Other people will have better advice but I will say that the amount you pump is not a sure indicator of how much your baby gets from direct feeding. Boobs respond to pumps in different ways, some get spooked and won't cough up the goods! Try to pump when comfortable and then look at your DS or think about him, smell some of his clothes etc.