Forgive my laughter but I couldn't help it after reading about the veggies. That is the culprit. When my son was an infant they still had the spinach in the Gerber jars of baby food. It was tasty (for him) going in, but the diapers after it came out were toxic. Both my husband and I would do everything we could think of to get the other to change the diaper.
I would cut back on the orange veggies and start introducing some others if you haven't already. When we started introducing solids to both my kids we'd alternate. Orange veggie for breakfast, green for lunch, orange for dinner. Then we'd add fruits and it'd be a fruit and a veggie for a meal, or they'd get some of the oatmeal's for breakfast. Or, yada yada yada.
Hope this helps,