Not coming into season - problem?

[Daisybell1]

Can anyone advise on whether this is a major problem or not? We have two working collies, both bitches, one is 6 the other is 3. Young dog had a season when she was 11 months old, and has never had one since. Top dog had her first season just after we took in a semi retired neutered male (she would have been 4 at the time) and has never had one since either.

They're not related so I don't think its a hereditary issue, is it simply because they don't have any contact with males of any sort?

Its not an issue for us at all, we have no plans to breed (and I know they should really have been spayed), and its very convenient that they don't have a season. I just wonder if it could be problem for them - if there is a hormone imbalance which could cause something serious.

I had female dogs and they always had their seasons every 6 months. They were not working dogs. They even synchronised their seasons so they were in it at the same time. I heard that this is often the case. I had no male. Could it be a working Collie 'thing'?
I have not heard of this before.

Very light seasons and particularly clean dogs so you have not noticed?
None of my bitches ever came under this heading but I have heard others do :o

It could be a collie thing... They're not worked so hard they're elite athletes or anything (very pampered pooches) and they could just be cleaning up. We haven't had any visitations from the local working dogs which happened when they did have those first seasons (and they visited next door's bitch when she was in heat )

No seasons here for about 10 years, barring a small blip a couple of years ago when she had 2 in a year. Doesn't seem to be a problem, though she is a huge girl and often mistaken for a male at first sight.

They are perhaps producing a little too much testosterone for a female to ovulate?

At dog shows the females must look 'feminine' and the males 'masculine'. No definitions have been given by the kennel club, but one judge said that this male had the wonderful presence of a proud stallion!

that's a thought. Although both are clearly girls, and one certainly isn't butch but is very willowy/lyth