Christine - I would think it would affect your supply, in that it would just drop down to supplying the 3 feeds a day iykwim. 3 feeds a day doesn't seem to me to be enough when it's meant to be their main source of nutrition until 12 month?? (but that's just me). Personally, I reckon if the waking in the night isn't bothering you, I'd just let things ride out. Sounds like what you're doing now works just fine