Yeah, we bought a kitchen scale when he wasn't eating. We brought him home at 148grams (he was about 6 months old). I weighed him 2 months later, worried that he'd lost weight, but he gained and was sitting at 165grams. He's eaten twice since being weighed, so I'm thinking he's okay.
Jenny on the other hand, aside from this last week, has been a beast with her meals. We brought her home at 169grams and when I weighed her on the same day as Forrest, she was a whopping 242grams. She shed/pooped a couple days later and dropped to 210grams, but I'm not worried about her at all.