Sorry if this is a bit elementary, I'm a mum of 2 but DS2 is my first non-SN baby (DS1 was born at 31w and has cerebral palsy) so I'm not sure if this is normal or not!
DS1's CP meant that he couldn't get enough BM to sustain him, so we switched to formula at 8 weeks (so 1 week early if you adjust for the prematurity) after he lost a lot of weight and I had a nightmare week of him feeding for half an hour every hour day and night.
DS2 was born at 37+4, took to the breast straight away and hasn't looked back. He didn't lose any birthweight and typically gains at least 4oz a week. He feeds every 1.5-2 hours for about 15-20 min a time and sleeps well between feeds, but doesn't want more than 1 breast and has only managed a 3 hour stretch between feeds once.
Luckily I'm coping ok on this much sleep for the time being but wanted some advice on whether this is typical for a 4-week old. He did feed for an hour last night, but I put that down to needing comfort as he's got a cold at the moment.