at about what age do the females stop breeding?

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Average lifespan for a wild rat is 13mths in captivity they can live upto 36 mths but that is not the norm. Most captive bred ones here don't make it much past 22mths, certainly wouldn't be breeding past 18mths.

I got a 2yr old rescue in and she had a litter but that's not usual.

I plan to retire mine at about 10-12 months old.

I've only had 2 litters from each of my does I've mated but I 'may' have another if they seem fit enough. They are currently about 9 months old.

As they get older the litter number dwindles as well so it's better to keep a youngster back and breed that.

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Sax

Got too many to mention!!!!!!

Stupidity is no excuse for bad behaviour.
I know many stupid people that don't behave badly!!!!!

ahh cool, think mine were about 6 months old when i got them, and have had them 6 monthsish now too, so looks like they wont be breeding anymore more now, i have a hold back female, who im waiting to get to 6 months old(as iv heard thats the best age to start breeding) and bought a lovely champaign hooded female the other week, so if they retire i still have the one, and the lil one growing.

the ginger one only had 1 litter, but they husky and white must of had about 10 litters each.

Although the husky is still fading into white on her back end and nose.

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I retire mine at 13 to 14 months, same as my breeder mice.
I set up cage with animals about 6 weeks old.
The cages are marked with an expiry date 12 months in advance.
After 12 months the breeders are replaced with some 6 week old mice or rats.
Stephen.

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www.SnakeBreeder.com
Various types of corns including Opal, Anery Lavender, Lavender, Snopal, Hypo Lavender, Hypo Bloodred, Bloodred, Pewter, Snow, Anery, Amel, Creamsicles, Ghost, Butter, variuos Stripes and motleys and Classics.