125-175g rats IMO is over feeding.

I dont feed anything over 80g which is a large sm rat. They grow just fine and dont poop as often since their not being over fed.

If when you get poops and their big thats a sign ive noticed of over feeding as the food is just passing right though them.

Since i only feed 60-80g rats to adults, if i have a spare here and there, i will give the extras to females