Will a group of female dogs living together go in heat at the same time?

[Angelica]

I have three female dogs, one of them is about to be 2 years old and has had two heat cycles so far and the other two females are about to turn 1 (their one month apart) and are displaying signs of going through their 1st cycle. The thing is my 2 year old just finished coming out of her heat cycle about 2 months ago but appears to be going in heat again. Are they going in heat all at the same time because they live with each other or is it just a really weird coincidence? Would like to know for thier future heats, it would be easier if they all went on the same time.

[Luli]

It's possible.

Human women that spend a lot of time together tend to all end up with very similar menstrual cycles.

Similarly, it would be advantageous for a wild pack of dogs if they all have puppies at the same time - strength in numbers and all that.

The breeder i am in contact for a border collie says all her b1tches are due in heat on the same time...