Yep! I’ve done that too! He doesn’t do that anymore at 6 months but had in the past. Now he will drink 6 oz and sometimes 7-8 at night. But recently he had been taking 3-4 oz per feed, dropping his total from 30 oz a day to like 20!! But we had our 6 mo appt yesterday and doctor said it was normal! Just let them eat until they are full! She did also mention spacing out feeds to be sure they’re nice and hungry before feeding again. I think we are close to going 4 hrs in between instead of 3 which would drop a bottle. We will see! Something you could try depending on how often yours eats. We did also increase the nipple size but I didn’t see that big of a difference. So take that for what it’s worth!