Sleep and feeds

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Hi just want some advise on feeding at night
My daughter is just over 4 months now and sleeps amazingly on a night and has done since birth. I have some sort of routine but I'm finding it harder now and thinking why am I still doing it, her last feed is normally about 6 or 7 then she will go down for the night, I'm still waking her about 11 to top her up she will drink it maybe not all of it. I worry if I stop the 11 o clock feed she has lost that 1 feed which she has 5 bottles a day and won't gain Weight and we can't weigh our babies at the moment. She's a happy baby wet nappies and will sleep for a good 7 hours with maybe the odd wimpier she's lost her dummy through night! I skipped her 11 o clock feed last night and she slept from 8 until 6 so she slept even longer.
Thanks in advance

Re weighing we just bought a set of scales, I weigh myself, then weigh me with the baby (baby naked) and the subtract my own weight from me and the baby's and then plot this in the red book.

I wouldn't wake a sleeping baby, if she's hungry she'll wake! Or could you give a larger amount in her feeds during the day?

I wouldn’t carry on waking her if she goes through without it; you may find she takes a little more during the day without that feed. Keep an eye that she has plenty of wet and dirty nappies but if she hasn’t previouy had issues with weight gain it’s unlikely that stopping that one bottle will make a difference.