Agree with above. Maybe a bigger teat size will help?
@Susie like go up to a size 2?
You can try that and see if he finishes his bottle more easily.
Definitely don't add anything to his milk, as this shouldn't be done at any age! It shouldn't take that long to finish a bottle though, so perhaps try a bigger teat size
@Rebecca I’m confused on how bigger size would be quicker? I have different bottles that he does finish faster but I notice he spits up more and is more fussy when I use them 🤦♀️ I’m in a nutshell beyond
Don't add anything to his milk, it shouldn't be done at any age. Use the bottle you are currently using and try a bigger teat. If the other bottles make him spit up I wouldn't use them
He’s cluster feeding which is completely normal. Farrr too early to add anything to the milk! At most you could supplement with some formula