have you tried offering half the bottle, sit them up and burp them, change their nappy then do the other half of the bottle? might wake him up a little bit. if you are formula feeding him, go by what the tin says with feeding not with their corrected age.
I stop and burp him heaps cos he only goes so far before he will stop drinking then I have to burp him and try again
He will stop for a burp 3 or 4 times during feeding. I am going by what he will take. Sometimes he will drink 160ml other times 130 and as I said other time 100 or less.

I think 100ml is good for a 4 week old (corrected age). Is he having about 6 feeds a day?
It is not uncommon for prems to take longer to feed and for it to tire out quickly.
Have you tried the next teat size up so he doesn't have to work so hard...if he splutters on it go back tot he smaller one.
Is he putting on weight? Plenty of wet nappies?
If so then he is probably getting enough.
If you are concern it might be worth talking to you CHN.
He has heaps of wet nappies so I know he is getting enough (well I think anyway) and so far he's been putting on weight reasonably well. He has 4 to 5 feeds a day depending on what he feels like
I have just changed formula brands and he seems good with the new 1 and he's already on quiet fast flowing teats as he would fall asleep much faster with slow teats. I was thinking of putting some thickener in it cos he has been chucking a bit but I am wondering if thats a wind thing.
I have a health centre appt on Thursday so I might ask her what she thinks.
Thanks for the feed back ladies I am glad to hear it sounds normal to have a premmie feed slowly

Shazzi congrats on ur pregnancy. I was very worried too with DS as DD was 4 weeks prem (not much really) and DS came 8.5 weeks early but because of a completely different thing. Its very hard to know how things will pan out so my advice to u is to try to think positive thoughts and be prepared to have a happy healthy baby no matter what gestation bubs arrives at