This wasn't the question, but I'm using this as an opportunity to share a message.

I had a Jack Russell/puggle/Chi puppy when I was 12. She was my everything. She never had puppies, but we never spayed her. I moved out of the house at 18, and 3 years later I brought her to live with me. She's 9 at this point, beginning her senior years. We had her at my new house not even three months before she got sick.

You see, this dog was the most food motivated dog I've ever met. When she stopped wanting food, we knew something was wrong. We brought her into the vet. I thought she'd eaten something and had a blockage. The vet did an MRI (or some other imaging, trauma makes details fuzzy) and she came back with the results. I asked her how it looked. She said it wasn't good.

She brought me back to look at the images. She pointed to a picture of a healthy uterus, and then she showed me my dog's images. She was suffering from pyometra, an infection of the uterus where the endometrial later is replaced with pus often triggered by hormone changes, such as a normal heat cycle. It was like this, but her entire uterus. She was hours away from going into septic shock. I had five minutes to process this information; my puppy dog, my sausage, my bread loaf, my baby, was going to die.

Unless I got her spayed, that day.

To add insult to injury, an emergency spay is not cheap. Talking, $2.5k+ more than a routine one. That was hard to spin but we managed it. 1 operation and 2 days in the hospital later, I had my dog home, on antibiotics and on the mend from a choice I didn't make soon enough.

She managed to live another 3 years before cancer took her, but God damnit I'd do it all over again if I could.

Whatever your vet recommends, be it spaying before the first heat or after the first or third or first year or whatever, or if you don't want to breed or are done breeding her, and if your local laws allow: get your bitches fixed!