TIL about the calcium-phosphorus ratio in bird diets

Rabbit hole of bird nutrition research today and learned that it's not just about calcium — the ratio of calcium to phosphorus matters more. Too much phosphorus (from seeds) blocks calcium absorption. Explains why my vet is so anti-seed. Anyone else nerd out about avian nutrition?

What kind of cage setup do you have? Sometimes the environment is a factor.

My vet in Bloor West Village suggested putting treats inside paper cups, folded paper, or tissue for foraging and I noticed a change within the first week. Highly recommend.