Cookie - do you put down awake at night?
Being able to self-settle is key to nighttime sleeping I think and different babies are ready to self settle at different ages. My DC1 was much, much older until she could self settle to sleep - over a year old, but DC4 has been completely self settling at night for a week or two now.
By self-settle I mean to go from fully awake to asleep without parental intervention. In an ideal world this would be without any external intervention at all - just baby in cot and left to it. In the real world children often need a comforter to get to sleep - dummy, blankie, teddy etc. I use dummy because I find it most effective.
It is easy to assume baby wakes for hunger at night. This may be true. But babies also wake because of their normal sleep cycles and so cry because they just need to go back to sleep but need help to get to sleep. Baby can also wake because of being uncomfortable (hot, cold, nappy, sore bum, pain, bunched up clothes or blanket).
Once you have a baby who can go from awake to asleep then you can start to distinguish between just waking and needing to go back to sleep. Or waking for a reason - hunger, uncomfortable.
So with DD now, mostly the dummy will get her back to sleep in the night. If it doesn't then I know there is something else the matter. Recently she's been waking at 4am and I have discovered that she is waking because she's cold. Coming into bed with me sorted it. So I have added two extra blankets (on top of sleeping bag) and now she's sleeping fine again.
With my DC1 though I couldn't do this. Because she wasn't self settling it was hard for me to know if she was just tired because it was so hard to get her back to sleep at night. So I fed her to sleep because that is the most efficient way to get her back to sleep.
Absolutely nothing wrong with feeding back to sleep, if it is what works for you. As I mentioned earlier, whatever works for you is the right answer for you. You both need sleep.