6 months old
People also ask
How long does it take a dog to go into heat?
It can take some dogs 18-24 months to develop regular cycles. Small dogs will tend to go into heat more frequently, as much as three or four times a year. Very large breeds, like Great Danes and St. Bernards among others, may only go into heat every twelve months.
What does it mean when a female dog is in heat?
In this Article. Estrus, or heat, is the stage in a female dog ‘s reproductive cycle during which she becomes receptive to mating with males. At this time, estrogen levels first increase and then sharply decrease, and mature eggs are released from the ovaries. Ideally, your dog should be spayed before she enters her first heat cycle.
Can a 2 year old dog have a first heat cycle?
While a dog鈥檚 first heat cycle occurring first at two years is rare, it鈥檚 not unheard of. How long does the first heat cycle last? Once your dog comes into her first heat cycle, the next big question is how long will it last? Again, this varies from dog to dog, but you can expect her to be in heat for about two to three weeks on average.
How old do Labrador Retrievers have to be to have heat?
Medium sized dogs like Labrador Retrievers generally go into heat in that 6 month range, however it can be up to a year before they have their first heat. Owners of large breed dogs tend to be the ones that have heat cycle scares. That鈥檚 because large breed dogs may not have their first heat until two years of age.