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.
From 7 months to a year...
Male rabbits can be fertile for sure around 6 months of age. BUT if you have more than one rabbit and do not want to breed (there thousands of unwanted rabbits in rescue centres) then it is advisable to separate them from 9 weeks onwards. Reputable breeders will sell kittens (the correct name for baby rabbits) from 9 weeks onwards and NOT BEFORE. This is because they need their mother's milk and her soft droppings to help with bone density and antibodies.
Rabbits can become pregnant as early as 3 to 4 months of age.
Never.
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.
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.
Female rabbits can become pregnant as early as 3 to 4 months of age.
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
Male rabbits should be neutered BEFORE they become sexually mature. Somewhere between 4 months and 6 months would be your best bet.