My 6.5 month old simply will *not* nurse other than lying down in our bed. Alone. With no interruptions. Which is so not practical with twin 5 year olds and a 4 year old in the family as well.
In the last two weeks, I have resorted to pumping and bottle feeding her when we can't lie down. She had not gained much weight (9 oz between 4-6 months), and I simply wasn't willing to continue with a suck here and a suck there as her only nutrition during the day.
Now, our routine looks like this:
Nurse first thing in the morning
6-8 ounces pumped milk mid-morning
6-8 ounces pumped milk around lunch time
Nurse mid-afternoon (big kids have rest time in their rooms)
6-8 ounces pumped milk early evening
Nurse at bedtime (just after putting big kids to bed)
Sometimes she'll wake up again to nurse around 10-midnight, and sometimes she'll wake up between 4-6am and nurse. It's far more common for her to eat again around 10pm or so, maybe 3-4 nights per week I'd say.
I've also just started giving her a few nibbles of avocado (loves it), banana (hates it), and peas (loves loves loves them). I usually do that at dinner time, just before bath, for obvious reasons.
If you're dealing with older children that can't be left alone while you lie in bed with the baby, it's really hard. We fought this battle from about 4 months til I started pumping and feeding. Thankfully I have a really fast let down and my milk sprays her in the face, so nursing is at least *as* easy as bottle feeding for her, so I don't worry about her refusing the breast cause it's more work.
Really though, if it came down to it, I'd just pump and feed her from a bottle. Lying down in bed for every feeding just is not an option unfortunately. Pumping then feeding is a PITA, but at least she's eating, and I have a really easy time pumping too, so that helps.