Do you mean how old should a dog be before having puppies? If so, I generally recommend that they are at least 18 months. If you are asking how long should they be, there is no criteria, that I am aware of, for this.
SYong, DVM
kopingerdg
The dog's gestation period is 64 days, so about two months after you remove the male you can expect puppies if the female got pregnant.
if im not mistaken it takes a female dog about 9 weeks to have puppies so about three months give or takeit takes about 8 to 9 weeks for a yorkie to have its puppies...i know this because i have a female yorkie who just had its own puppies!
until the newborns are adults
2 months
Yes it would as long as it was already pregnant.
not for too long
As long as your female boxer dog and male boxer dog are not related, you can allow them to mate and have puppies. It is up to you if you want to sell the puppies or just raise them yourself. If you do not neuter the puppies they will try to mate, but since they will be brother and sister it isn't recommended that you allow them to mate.
for 590,567,876,985,777 seconds exactly
They should both be neutered! Aren't there enough unwanted puppies out there?!
all puppies should stay with their mom for at least 8 weeks (2 months)
To have puppies, you need a female and a male pet, and a pet house. Then your sim can tell one of the pets to try for puppies or kittens with... the other pet. I don't know how long it takes yet though.