Is baby..

Nope. He slept through the night when he was about 2 months but it didn't last very long. He's 9 months now and still wakes up at least once in the night.

My 11 month old baby is, my 1 week old isn't.

Basically....she sleeps from 9pm to 4:30am, and has since birth. 

Well she can go for a 6 hour stretch so technically that is considered "sleeping through the night" If I could get those 6 hours that would be great, but my bedtime isn't at 7:30! She still gets up for one night feeding. On a good night she will eat and pass out. On a bad night she will stay up and party like its 1999.

...oh and DD is 7m/o

No,he's about to be 15 months.

This.... he gets up sometimes once, sometimes 7 times

Quoting bbyB10:

11 MONTHS OLD AND NO , NOT YET ://///

Not all night, no.

Yep about 2 months old. He is normally down by 8-8:30 and is up around 5 or 6am. He's 4 months now.

Depends on your definition of "sleeping through the night" my ds started sleeping 10hrs straight at 10months old. Some people say 6hrs straight is "sleeping through the night" if i were to go by that definition than probably around 4mon. I think its "sleeping through the night" when i put my child to bed when i want them to go to bed and they wake up when im ready to wake up.

yes. he is 18 months old and has sleep through the night since about  4 months old.