Hello! My little girl is 12 weeks. She started on the low 9th percentile and has steadily put on weight to the point that the last 2 weeks she has jumped the line to the 15th percentile. The weight gain isn't a dramatic jump so is this nothing to worry about? She is healthy apart from having had a bout of gastroenteritis last week, which caused diarrhoea but not sickness. I have changed her from sma to cow and gate in the last couple of weeks as well Thanks :)