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[tourettedog]

I had a pretty good pack of wardogs at one point, but recently they've started dying of old age and they aren't breeding any more.  I don't have any assigned to people, and a fairly small portion of them chained to something.  I've had more dogs than this in the past, and I've had more dogs that continued to breed.  I've checked and there's a decent mix of male and female ones among the loose ones, and I haven't preferentially chained any one age group, but yet haven't seen a single birth in the past two years or so.

[Toady One]

What's the total animal population of the fortress?  You might just be bumping up against some stupid species-independent cap.  Are other animals breeding?

[tourettedog]

The total animal population at the moment is 109, down from a peak of around 130 or so.  I haven't noticed any cats breeding lately either, but cows and horses are

[tourettedog]

Update: with an animal population down to 87, I'm getting puppies again; still no kittens.  Maybe an animal (or dogs and cats in particular) can only get knocked up when the population is under 90 or 100 or whatever, and the excess over 100 was a result of lag from that?

[Toady One]

That could be.  I should check the code at some point for a definitive answer, eh eh eh.  Anyway, I've written this down and will take a look when I can.

[Esper]

I'm having the same problem.  I had 86 dwarves, 97 war dogs, around 50 cats, and around a hundred horses, and the dogs just stopped breeding.  My cats and horses are still breeding like uh...rabbits, to the point where I have three butcheries making nonstop horsemeat.  My war dogs, however, are starting to die of old age without any puppies to replace them.

I'm up over a hundred dwarves now, with approximately the same number of animals (down to 89 war dogs).  I'll see if any new dogs are born in the next couple seasons.