10 month old

Gwynne
So I think I dried up. I was planning on slowly weaning my 10 month old, but what I hoped to space out at least a month seems to have taken less then 2 weeks, the baby is less then pleased. I know the rule is 1 year old before cows milk, i have a little formula, but not enough. When did you start feeding your babe milk? Is the wait for a year a hard fast rule? Or is there some wiggle room.