Constipated?

Ji

We’ve been transitioning my daughter over to formula. Today it’s been 50/50 breast milk to formula, the two days prior it was 75/25. She hasn’t had a “real” poop since we started. She’s had two very little poops, like shart size I would say. It’s normal color, not hard, and she doesn’t seem to be straining. It’s just way less than normal. Is she constipated or is her digestive system just adjusting?