My dog just finished up her 3rd heat, at 2 1/2 yrs old. The calendar, and my neutered male chihuahua said she was done. And so, although I watched her like a hawk initially, I allowed her to see other dogs again, and most all male dogs were not taking notice anymore, so all was good right? WRONG! She has a particular intact male husky friend for whom, in spite of the calendar and other male dog's disinterest, was plenty interested. The really surprising part for me was that my dog was too! She actually stood for him disregarding the fact the her "standing heat" period was long gone! I guess, outside of just venting my surprise, the lesson is that one has to be vigilant for a month or more even, to be sure!
Another thing that surprised me a bit with this 3rd heat was her change in attitude. Previous heats I noticed no change at all, but this one she definitely was more cranky and temperamental (probably, I'm guessing due to her discomfort).
Either way, this will be her last heat. But I thought sharing her change in temperament this time around might help to underscore how different one dog can be from another, and even how different one heat can be from another with the same dog!
It's not the size of the dog in the fight, it's the size of the fight in the dog. Mark Twain