Whenever the owners want to stop breeding. =-)
At what age do female mallards get their adult feathers?
It is usually dependant on the female, how many eggs she releases during the cycle when the male mates with her. The number of puppies also varies with the mother's age and health, the father's sperm count, the timing of the breeding, and many other factors. Most dog breeding statistics are not done from the males reproductive abilities because he never truly runs out of the ability to impregnate a female due to age, were females will eventualy stop reproduction.
Syrian hamster come into heat every 4 days. When she gets to around 12 month old she will stop, as this is the average breeding life of the female.
Only by having the dog spayed. If you're not breeding, this is often promoted as the responsible choice. I spay or neuter all of my pets.
Not at all. For one the Bull Terrier has a flat skull with no stop and elongated muzzle whereas the Bulldog has a pronounced stop and a squashed muzzle.
Separate them.
to stop them from breeding.
Stop breeding them.
You retire a Female Yorkie from breeding at the age of 5.
shoot them Get a Jack Russel terrier.
Fed and generally looked-after well, and good general health permitting, birds do not stop breeding - menopause is unknown in birds