it all comes down to what you want to do............

if you want them to live longer...breed them less.

if you want optimum output... breed them more.

in my experience rats tend to start giving smaller litters at around 18 months of age. at around 9-12 months is when they are at their maximum.

once they start to give smaller litters it's time to replace them.

it all comes down to what works for you. at the end breeding is breeding no matter how you do it.

Pitoon

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