My girl is under weight too. She's probably the same age. And only 100 grams give or take a few. When I got her 2 months ago she was 54 grams. It just seems like she should be gaining more weight than she is.

Vets seen her said she looks good. Gave her a dewormer. I haven't had a fecal done yet.

I feed every 7 days. Maybe 5 would be ok. And I don't object to it. But every 7 days is easier to remember.

I'd say try every 5 days and see how it goes. If you get a few failed feedings try switching back to every 7.