Ah yes i know good for a three week old. Got no sleep for 18 months with dd. except at beginning she slept for five hours at a time and turned out this was because she was sleepy/poorly/losing weight. Da was also losing weight rapidly so we started top up at one week.
dd (4 weeks) is the same. Dp usually sits up with her in the evening so I can go to bed, then wakes me up with a horlicks and a hungry baby around 12 - 1 o'clock. I then get up with her in the night while he sleeps.
No, don't limit sleep during the day, just make sure he is sleeping in a different environment in the day. Mine slept in a moses basket in the living room at that age. Then up to the bedroom at nighttime, dim light, etc.
So is he waking at 10pm, sleeping at midnight, waking once in the night for a feed and then waking for the day at....when? It's tough because of DD waking at 6, I agree, but I think easier to change her than him at this age. How old is she? Can you bribe her into staying in bed a wee bit longer?
He is mix fed (am happy with this), bf every feed topped up with bottle most feeds, has long ones (as long as I will allow, often over an hour) then about 90ml top up. Sleeps for up to three and a half hours at a time, not interested in being woken up for food, if I give less top up just cries until he gets more. He is big - born 4.5kg, lost 16%, three weeks and almost but not quite, back to birth weight.
How often is he feeding in daytime? Be led by him of course, but if you make sure you feed frequently in daytime, and keep daytime bright as someone else said, he will figure it out. When you say ultra long how long are those feeds?
I know he's tiny (3 weeks) and it'll all change quickly but any advice welcome. Ds have big feed at about 5.30pm that last ages then long sleep then waking up for another big feed about 10pm and then wide wake for couple of hours. As dd wakes up at 6am I'd love to get ds to start nighttime at 10pm and have his wakey couple of hours before that. That way I could get some extra sleep (he's currently waking once in the night for an ultra long feed). Any ideas?