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DF Dwarf Mode Discussion / Re: Some animals don't want to breed
« on: August 31, 2014, 10:38:55 pm »Does this happen with 100% of roosters? What percent turn out gay?
'Sterility' effects roughly 25% of all creatures.
This is due to being gay, being uninterested in a relationship that produces children, or asexual.
Essentially, there needs to be a 1 bit in the "interested in children" flag area in the orientation field of the creature, which has about a 75% chance of happening.
Of interest, if you embark with 2 males and 2 females, you have an 87.8% chance of ending up with a viable breeding pair. With 3 males and 3 females your chances of getting a breeding pair is 96.9%.
I find that the animals I usually bring (Cats, Dogs, Peafowl) are cheap enough that I can stand to bring more of them at embark by culling some of the fluff from embark (Replace all the pigtail cloth and yarn with sheep yarn, dump the crutches and splints, dump the axe for a few chunks of wood, dump the buckets, etc).
Pigs, if you bring them, are a bit harder to justify the extra embarkation expense. However, I see wild boar often enough that I've stopped bringing pigs.



