I think it's normal for all babies to have periods of waking more frequently at night. Sometimes I recognise the cause e.g. growth spurt or overstimulation, other times it passes without me ever working out what the problem was. On one occassion when my daughter suddenly increased her night feeds during a period or rapid growth I worked out that she was needing more protein and by upping the protein in my own and her diets the problem was sorted out overnight. Another reason for increased night feeds is illness. A breastfed baby will up the feeds before any symptoms show up and sometimes I have wondered if my babies have fed more frequently when they have been fighting an illness that never progressed very far so I never became aware that was the cause. Unless my child is sleep deprived for any legnth of time I never try to change their feeding/sleeping patterns but instead my solution has always been to try to find ways to get more sleep myself. For starters we co-sleep and feed laying down so at least I am resting if not actually sleeping during feeds. I have trained myself to power nap - this took a long time but now I can rest my eyes for 10-15 minutes and feel as if I've had a proper sleep. If I've had a run of bad nights I'll hop in bed for an hour or two of rest/sleep when dh gets home from work. Dh and I also have an agreement that we take turns on the weekend sleeping in and the one having their turn stays in bed until noon either reading, sleeping, meditating or just resting while listening to the family going about their day. On a good week I don't need that and get up to join the family after a little lie in but on a bad week it's just the ticket to catching up and setting me up for the next week. I've also used homeopathics and aromatherapy sometimes with not much affect but other times it's like magic (probalby when I get the correct remedy). My favorite aromatherapy regime for sleeping is a bath with camomile and a massage wtih lavender and a few drops of lavender in the middle of the bed so that we get wafts of it through the night.

Hope that helps