In unspayed dogs, the first estrus cycle, or heat, usually occurs between 6 and 24 months. In smaller breeds, the first estrus is often earlier than in larger breeds.Know More
A female dog's behavior changes markedly during estrus. She becomes more affectionate and may appear nervous or agitated. More frequent urination is also an indicator. A male dog is typically attracted to a female in estrus for approximately 18 days, but she is attracted for only half of this duration. When the female dog is fertile, her vaginal discharge changes from light red to straw-colored and decreases in volume.
To prevent estrus, a puppy can be spayed as early as 2 months.Learn more about Dogs
The first time a Golden Retriever goes into heat is when she reaches approximately 10 to 14 months old. There are circumstances where a dog can go into heat at a younger age, but this usually happens when she is around other dogs who are in heat.Full Answer >
On average, a female dog that hasn't been neutered or spayed goes into heat twice a year. The duration of the heat cycle is between 12 and 21 days, although this varies between breeds and individual dogs and can last up to four weeks.Full Answer >
A dog that is not spayed first enters heat when she is between 6 months old and 24 months old. If she is spayed, she normally experiences heat twice a year. Smaller dog breeds typically experience heat earlier than larger breeds. Heat lasts about 18 days.Full Answer >
Unspayed female dogs tend to experience estrus, or go into heat, twice a year. Some breeds go into heat more often than others, and spayed dogs do not go into heat.Full Answer >