Hi!!
I had the same trouble that my Dd wouldn't get a good flow thru it,so i cut between 2 of the dots to make the flow better.Once I did that as she got older,I just increased the cuts to suit her.Then she had no problems with the flow at all.
My DD had her juice,water and milk all out of the same as it was the only thing she would take.
She is 4 now,and she drinks 2cups of milk a day still some days more.So having the 3 out of the same bottle didn't effect her.
I would say go with what you think is right,you are the only one how no's your child 100%.
Hope this helps
Andrea...