For dog owners, when do you switch your puppy from three to two meals/day?

My sister’s pup is 9 months old, 40–45 lbs. and very high energy. She is part vizsla, part whippet, part greyhound, sleek, long-legged and a hunter.

Meals now are real home-cooked food (turkey soup, vegetables like broccoli) and kibble as a side-dish plus lots of training treats.

When you switch from three to two meals, do you serve the same amount in two portions or simply less food.