How much milk is your baby drinking?

Vanessa β€’ Married to the most wonderful & handsome man in the world! πŸ‘§πŸ»πŸ’ž born Oct. 23. 2016 & πŸ‘ΆπŸ½πŸ’š born May 2. 2018 β™₯️IG: DwyerBearFamily
My 6 month old drank 7oz today, I was shocked. Lol. We were so used to giving her 5oz and I think she is needing more now. 
The Dr. said to start off by giving her solids once a day and she should be drinking formula every 3 hours but I noticed she gets hungry so much sooner then 3 hours and I think it's because she wasn't drinking enough formula?