Warrior_Kitten 
"[@Wiimeiser":](/images/2182576#comment_8579588
)
Sadly with how some fics on FIMFiction go, this would probably be valid. I've read fics where thestrals (bat ponies, or how I like to call them Lunar Pegasi) are a receding population. They're going extinct. So a "breeding initiative" would be a valid way to bump the population. Find compatible female and male volunteers from both sides, if it takes, bam you've got a new batpony. The genetics and line may no longer be "pure" batpony as a result of this, but if it's in efforts to save a population from extinction, mixing genes with other populations is valid.
Of course, with that in mind, you always try other options first in attempts to keep the race "pure". Breeding between batpony volunteers, artificial insemination, etc etc.
Electric Bulwark
Sadly with how some fics on FIMFiction go, this would probably be valid. I've read fics where thestrals (bat ponies, or how I like to call them Lunar Pegasi) are a receding population. They're going extinct. So a "breeding initiative" would be a valid way to bump the population. Find compatible female and male volunteers from both sides, if it takes, bam you've got a new batpony. The genetics and line may no longer be "pure" batpony as a result of this, but if it's in efforts to save a population from extinction, mixing genes with other populations is valid.
Of course, with that in mind, you always try other options first in attempts to keep the race "pure". Breeding between batpony volunteers, artificial insemination, etc etc.