How old can female dogs be to have puppies and when do heat cycles stop?

Thank you for contacting Petco Pet Education Center, formerly Petcoach with your question about Lottie. She will never stop her heat cycle, dogs do not go into menopause like humans do. She will be fertile for the rest of her life, and will be at risk of developing a pyometra. A pyometra is an infection of the uterus that is fatal without treatment. I'm not sure who told you she is too old to be spayed, but that's not true. There are many dogs who are spayed at nine years of age and older. Her anesthetic risk will have to be assessed by a vet, but surgery is not off the table due to her age. Plus if you leave her unspayed, she is at risk of a pyometra, which requires an emergency surgery that costs thousands. It's better to get her spayed now. I hope this helps.

Thank you for submitting your question! Most puppies will start their first heat cycle anywhere from about 6-10 months of age. It can last upwards of 18-21 days. You will notice swelling of her vulva and mammary chain. She will spot and bleed as well. Some dogs keep themselves very clean and you only see small amounts of discharge, others will require diapers. You may observe some behavioral changes as well. These can include a decreased appetite, attraction to male dogs or being more clingy to you. Most dogs will cycle every 6-9 months with small dogs cycling more frequently and giant breeds less. I hope this information helps!

A dog goes into heat once every six months. A first heat typically occurs after a dog is six months of age, but large breed and giant breed dogs go into heat later, sometimes closer to two years of age. The number of times over a lifetime depends on when the dog first goes into heat, and how long they live.

Female dogs don't actually stop having [heats](https://www.petcoach.co/article/anatomy-and-function-of-the-reproductive-system-in-dogs). This is because as they get older, they do not always show the external or behavioral signs that they are actually having a heat, this can sometimes be referred to as a ‘silent heat.' It is important to remember that even though your dog may not be showing signs of being in season that she could still get pregnant if mated by an intact male dog. Ideally, you should consider having her [spayed](https://www.petcoach.co/article/spaying-ovariohysterectomy-the-benefits-in-dogs). There may also be an undiagnosed hormonal disease or ovarian disease present that stopped her cycling. In order to make sure it is not a serious condition you should have her checked by a veterinarian. It is possible that it is a harmless reason, but it is also possible that there is a serious underlying condition.

No a dog's growth does not stop after her first heat. Some dogs continue growing, although slowly, until about 18 months to two years of age depending on the breed. I'd have a diaper for her so she doesn't bleed all over the house. Exercise her at her pace. Keep her away from all intact males during her first heat. I hope this helps!

Thank you for submitting your question regarding Odesia. When a dog comes into heat, her mammary chain and vulva will swell. She will have a blood tinged discharge. A heat cycle lasts approximately 18-21 days. Spaying her prior to her first heat cycle will prevent this from occurring. Most dogs come into heat for the first time around 7-10 months of age with larger breeds starting their cycles later. If she goes into heat, doggy diapers with a feminine hygiene pad are an easy way to keep her clean. I hope this information helps!

Hello and thank you for reaching out to Petco Pet Education Center, formerly Petcoach. An intact female dog, depending on the size and breed, will likely have her first heat cycle between the ages of 6 months and 18 months. If she were bred at that first cycle, she should give birth approximately 63 days after this mating. I hope this is helpful!