This is such a minefield! I think nearly all MCHN will have different ideas of what constitutes poor weight gain. I think if they consistently only ever put on that much, then that is just the way that they are. Also take into account the other factors like had he just had a large bowel motion, or a very wet nappy or a feed jsut before the last weigh - there are so many things that can contribute to how much weight they put on from one week to the next.

it is also possible that at the last weigh in he'd just had his three week growth spurt and now things have settled down again to a smaller gain.