My 5mo baby has a dip in appetite and also she does not want to be bottle fed, as a result, she is not taking in much milk. She will either play or resist the teat of the bottle. As a result, much of my breastmilk is wasted coz thrown away. She resists both breastmilk and formula milk. If we spoon feed her the milk, she is okay... Is it related to teething?