Baby gets totally knocked out from bottles, doesn't happen with boobs. What's the problem?

1 month old baby gets totally FUCKED when I give her a bottle formula (up to 120ml, or I think 4 American Oz)

It's as if she just injected heroin. It's easy enough to make her sleep after that.

When she drinks milk from boobies, she doesn't seem as "stoned" and it's much much harder to get her to sleep. She's just very fussy and never looks or even feels very full.

Since she's mostly breastfed, it means she's mostly awake and fussy and never seems full.

What's the problem? Is the baby supposed to get "stoned" from breastfeeding? Or is it only formula that does this?

Could it be a problem with mother's milk supply or "flow rate"? Too slow, or not enough?

We have the smallest teat on the bottle, rated for 0 months.

I am the father.