Mice reach sexual maturity as early as 5-6 weeks old but I do not recommend breeding them until they are 10-12 weeks old because breeding them at an early age can cause serious problems such as stunted growth, death, and failure to give birth to all of the litter.
Mice can start breeding at around 5-6 weeks of age. However, it's recommended to wait until they are at least 8-12 weeks old before allowing them to breed to ensure they are fully developed and healthy.
At two to three weeks old they can start weanning at 3 weeks they can start mating at 4 weeks
At least 12 months of age.
A male Yorkie should be at least a year old to start breeding, and it's better to wait until he is closer to two. This gives him time to mature and allows you to make sure he does not develop any genetic faults that he might pass on to his puppies.
At least 15 months of age.
3 years of age to start breeding
Mice can start breeding at around 5-6 weeks of age. However, it's recommended to wait until they are at least 8-12 weeks old before allowing them to breed to ensure they are fully developed and healthy.
Yes, female mice do get too old to have babies. After they are 1 1/2 years (mice only live for about 2 years) they would be too old because the females hip start to get smaller so it is harder to have a baby. You can breed mice when they are 10 weeks old, but you should do some more research.
Less than six months
Around 6 months old!
Your cockatiels should be at least a year old before you start breeding them to prevent ill offspring.
I would say that you shouldn't start breeding before 1 1/2 years old, any age before that is too young, and they need to mature, but after they do that, and have had at least 2 heats, and get used to it, then i would say its a good time to breed them.
about one year old
They breed when they are 3 years old this is for male and female harris hawks.
A baby mouse must be at least one week old before a person can handle it. Baby mice are very difficult to take raise.
10 days old.
At two to three weeks old they can start weanning at 3 weeks they can start mating at 4 weeks