How long is a Labrador in season?
Your female Labrador’s season will last approximately three to four weeks. The time that she will ovulate is about ten days to a fortnight in. At this point the colour of her discharge may change from pink to colorless and her flagging will increase.
How long does a Labs first season last?

between 2-4 weeks
Heat usually lasts between 2-4 weeks. Early in the cycle, a female dog may not be receptive to male dogs, although some are receptive through the entire cycle. It can be shorter or longer and you’ll know the cycle is over when all her vulva returns to its normal size and there’s no more bleeding or discharge.
How long after heat can you spay a dog?
Vets will typically not recommend spaying while your dog is in heat. More blood flows to the affected area during this time, and that can complicate the surgery. Your vet might want to wait two to three months after your dog’s heat cycle to spay.
When do Labs calm down, at what age?

As i said you, Labs mostly calm down as they reach the maturity stage during 2 to 3 years of age. But these Labs which tend to be hyper stay hyper and anxious throughout their lives. There are various symptoms with which you can identify that your Lab is a hyper one.
When does a Labrador Retriever become an adult?
You can consider your Lab as an adult one as soon as it reaches 18 months to 24 months of age. This adult stage lasts until 7 years of age. Even though your Labrador is active during this period, it seems to have slowed down a bit. Instead of exploring and investigating, it prefers spending time with you and the family.
How long does a lab stay in heat?
Although there is no exact number of days, a Labrador stays in the heat for 3-4 weeks approximately. This includes the Proestrus and Estrus stages and the number of days for each individual stage differs among the dogs. Even though your Lab is not willing to mate in its beginning stages of heat, it becomes sexually receptive during the later days.
When does a 4 year old Labrador Retriever stop growing?
It’s fairly obvious that if your Labrador is four years old, he is not going to get any taller (though of course he could get fatter). But what about a two year old Lab, or a one year old? Well, in broad terms, dogs stop growing sometime between one and two years old. But it varies between breeds. More puppy information!