I find dd does the same thing when she isnt actually hungry, usually she is tired. I had a stage where i was misreading her signs and mistook hungry for tired so i was trying to feed her all the time (probably too because ds was a constant feeder so i thought dd would be the same) when she wasnt actually wanting it. Then all our feeds would be not nice ones cause she was having little top ups all day and not actually needing full feeds.