How many ounces your babies eating?

Ta

My baby boy will be 4 months on the 22nd. He has been exclusively breast fed until now. He has finally taken a bottle. Still breast milk though. He has taken a bottle four times now.

I have lots of milk stored in my freezer but I have noticed he wants to eat a lot more lately. He could be going through a growth spurt also.

Tonight I fed him both boobs. Then had to give him a 4 ounce bottle. I think my supply is low today because I didn’t drink much Water today.

Just curious if I was to give him a full feeding with a bottle how many ounces I should make it.