Weaning early

Emily 🤱🏻

My baby is almost 11 months old. I’ve been breastfeeding him since birth. Lately my milk supply has been lowering to almost nothing. I think a lot of it has to do with my hormones of trying to get my menstrual cycle back. If my milk dries up before a year old could i start giving him cows milk or would I have to give him formula for the last month before he turns 1?