Just popping in to say 'what honey said. I have two boxer, and they are very different sleepers, in that the oldest is an Owl and the youngest is a Lark, but both of them were so much better until in introduced a gentle bit of Gina.
It was difficult at the beginning with MiniFC, as the FC loved holding him as he fell asleep, and I had to drag him away! But we kept him with us in the lounge and then gradually moved him away.
Number one son (NOS) slept through from 9 weeks. And he was exclusively bf. He started waking at 14 weeks. There was none of this '4 months sleep regression' stuff then, we were just told they were hungry. So I weaned him. He then slept. I have a skinny, healthy eight year old, who eats sprouts, olives, mackerel and Haribo! (other stuff too of course... That combination on it's own would make a pretty stinky house...).
MiniFC slept through at 6 months. So yes, the second child WAS harder! And I weaned him later, but still early, at 18 weeks. So go figure.
I think patterns are established early. And it was difficult taking an awake baby out of his Dads arms to help him get used to sleeping by himself. But it was worth it.
So yeah. What moo said.