So Monty has been on weaner rats for a year now - he is 18months old.
They are certainly smaller than his thicker section but he has one a week (he takes food about 8/10 weeks) and seems saited. last time I weighed him he was about 800g and is probably pushing a kg now.
How much bigger do small rats tend to be? I order my rats from Eurorep.
I imagine the answer is a bit subjective but how much bigger do they tend to be? Should I make the upgrade.