Reduced appetite?

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My daughter has always fed every 1-2hrs during the day with two 2-3hr stretches at night. Recently she has started going 3-4hrs during the day (night time is the same). Is this due to my supply regulating?! She’s had vaccinations and she’s showing signs of teething this week so not sure if that’s caused a reduced appetite. Worried my supply is being effected 🙁 she’s 9 weeks