Switching a Puppy from 2 to 3 Meals a Day

Hello,

I have a 5 month old Coton de Tulear. She has never been super interested in meals, although I still give her 3 a day and she has a little pick. She is healthy and a healthy weight (per Vet), it is just her normal and has gotten worse with teething. She sleeps in a lot in the mornings and goes through breakfast, usually waking 10-11. I was wondering when would be a good time to switch from 3 meals to 2. I have been finding a lot of conflicting information online so am just looking for some opinions and personal experiences!

Thank you in advance!