I've found my people.
Our foster daughter is leaving us at the end of the month after a year with us. She's 16 months old.
The one good thing about her leaving is that we'll get some SLEEEEEEEP.
She came to us at 6 months (but was 3 months preemie, so she was 3 mos adjusted age). She had NO self-soothing skills and wouldn't sleep for more than 20 minutes in her carseat/crib/hammock. If we slung her, and vigorously parented her to sleep and kept her asleep, she would usually take at least one 1.5-2 hour nap. It would take 1-2 hours to get her to stay fall and stay asleep at night (so basically our whole evening from 8-10pm would be putting her to sleep, going back in and putting her back to sleep, etc.) And she still would wake up every 1.5-2 hours for a bottle.
She actually qualified for Early Intervention mainly because she was 10 months old and never slept even close to 4 hours at a time overnight (2.5 was her max at that time)! Also, we still had to swaddle her for sleep or she'd smack herself awake. She did best swaddled until she was around 1 year old.
After starting occupational therapy, it got a lot better. She started falling asleep easier and staying asleep when we put her in the hammock.
Now she falls asleep really easily. Will take 2 naps a day for 45mins-2 hrs. Sometimes needs to be helped back to sleep during a nap, but usually not.
Overnight she wakes up for 1 or 2 bottles (from 8pm to 8am) and occasionally needs an additional cuddle or 2. Except for right now, cuz she's having horrible allergies and can't breathe well, so she's waking up every hour or so....
If we were keeping her for longer, we'd be on the road to her sleeping through the night. But, fortunately, her dad will have to teach her that.
Anyway, I'm so sleep deprived, I can't stop babbling!