The minimum age for breeding any female is 1 1/2 years or their third heat, whichever comes first. That is a standard age for any breed. The males can begin breeding as soon as they start producing sperm which can be from 7 to 10 months.
From 7 months to a year...
Depending on the species, male rabbits are often fertile by the time they are 7-8 weeks old. They should be separated from the females at around 6 weeks.
He is 100% fertile at the time of birth. Fertility declines with age.
5
From around 6-7 months of age providing testicular development was normal.
The age at which dogs reach sexual maturity depends on their breed. Small breeds tend to mature faster than large breeds. On average, however, males become fertile after six months of age and reach full sexual maturity by 12 to 15 months.
A beagle is typically full grown by the age of 2 years. However, female beagle should be spayed before their first heat around 6 months of age.
Male bulldogs typically reach sexual maturity and become fertile around six to nine months of age. However, it is recommended to wait until they are at least 12-18 months old before breeding to ensure they are mentally and physically mature enough to produce healthy offspring.
The age will vari between the sizes. Toy poodle males usually become fertile between 6-9 months of age. But usually not sexually active until between 9 months and 12 months of age. Miniature poodle males become fertile between 6-9 months of age. Rarely are they fertile at 5 months but it can happen. They are usually sexually active at 6 months. The same rules apply for Standard Poodles as for the Miniature poodles
Average males usually become potentially fertile (produce sperm) at age 13, however aren't fully fertile until age 14-16. See link in related links.
12 months
Given the usual conditions : intact female, fertile age, in heat, gets to mate with an intact male - sure.