My 9-month-old female dog hasn't had her first heat. Is she okay?

You are correct that Panda could start going into heat suddenly, as female dogs can start their first heat any time after six months. If you don't bland on mating Panda, I would get her spayed as soon as possible.

It is unusual that Maria hasn't gone into her first heat at her age, and it's possible that she has had a heat but it was a silent heat. I'd recommend a check up with the vet for this problem. It would be rare if she was born without a uterus, but it could be possible. Only a vet can diagnose this. I'd make an appointment for her this week. I hope this helps!

She could still go into heat at any time. Some dogs go into heat later than others, although smaller breed dogs tend to go into heat by a year of age. It could also be that she has gone into heat, but it was a silent heat so you didn't notice any signs of it. I'd have her checked out by a vet to be safe. Best of luck.

Some pets can be a bit delayed with their first heat cycle. I wouldn’t be concerned about her not being able to have a litter just yet. Give her until she is about 10 months of age and if she hasn’t had a heat cycle by then, it wouldn’t hurt to get her examined by your vet to look into possible underlying causes, especially if you are certain she hasn’t already been spayed. Best of luck with your pup Sadie moving forward. Take care.

Yes, it can be normal. Often times though, they have gone into heat, you just didn't notice. Some dogs keep their vulva clean so you don't notice any bleeding. If you are worried then I suggest you take her to your vet for a breeding soundness examination.

Thank you for submitting your question regarding your dogs. I suspect Phoebe will start her heat cycle within the next 1-2 months. There is a natural variation between on the onset of sexual maturity in dogs. Being the runt should not affect her in this area. I hope this information helps!

There first hear cycle can often be missed and be a silent heat since the changes in their body are new. It is common to miss it. At her age a second should be approaching soon. The lager the dog, the later and farther between the cycles can be.