I have a 4 month old baby, and am just wonderin...

I have a 4 month old baby, and am just wondering when night feeds are meant to stop. I keep getting differant information from everyone. My little boy wakes each night between 12-3 for one feed then goes straight back to sleep until between 5-7am. Sometimes when he wakes if I catch him early on I can put the dummy in and I get another 1-2 hours before he wakes again, but it just seems easier to feed him because then he sleeps till the morning. Any ideas??? I have heard of decreasing the amount in his bottles each night until eventually he doesn't need it - Has anyone tried this?