The Chirr Breeding Program is an initiative to set genetics and produce higher quality offspring. Due to the way layer inheritance currently works on 4dopt, Chirr ended up needing a lot of recoloring to look good after breeding. To circumvent this, and because I find it fun, breeding is being run manually by me for the time being.

How to Have a Litter

Prospective breeders can send private messages to account 1929 with the following form to reserve a breeding slot.

Mother Adopt ID:
Father Adopt ID:
ID of Adopt to Transform (if any):

The breeder must be in possession of both parents or have the other owner also reach out to confirm the breeding. Both parents must be chirr, and they must not share a parent or grandparent. Since this does not use the on-site breeding process, parentage and genetics will be recorded on a Google Doc.

Breeding will be limited to a maximum of four litters a week site-wide, with slots refreshing on Saturdays (Eastern time).

Chirr must be a week old to breed and female chirr cannot have litters two weeks a row. In the event of high interest, breeding slots will be prioritized for users who did not breed chirr the previous week.

At the time of breeding, the parents will be assigned genetic codes if they don’t have them already. 2-5 offspring chirr will be created with RNG names and recolored to match the outcome of basic Punnet square genetics and blending color ramp for colors. The offspring will then be reserved for the owner of the mother for 100pt each. If not purchased within 2 weeks, I will keep and sell the offspring myself and may eventually have to seeker them for space.

One offspring per litter can be transformed if you have a name you quite like; mention this is what you want when reserving a spot, and then reserve the offspring for me, with a creator shadow in their treasure (if you do not include one, the price I end up paying will be added to the adopt’s price on return). However, their genetics, colors, and markings will still be determined the same as a RNG offspring–these are not custom recolors!  Recoloring is still on, but markings, ears, and tail are edit/delete only, so bare in mind you might not get exactly what you want.


As I use Punnet squares, chirr are assigned rather rudimentary genetic codes, and then some choices are made about what to show on the offspring.

Pure-breed plains chirr have ear genes Pp and tail genes Ss. [Pp/Ss]
Pure-breed forest chirr have ear genes Ff and tail genes Tt. [Ff/Tt]
Pure-breed mountain chirr have ear genes Mm and tail genes Nn. [Mm/Nn]
Pure-breed desert chirr have ear genes Ee and tail genes Rr. [Ee/Rr]
Pure-breed lake chirr have ear genes Ll and tails genes Kk. [Oo/Ll]
Pure-breed cloud chirr have ear genes Cc and tail genes Dd. [Cc/Dd]
Pure-breed house chirr have ear genes hh and tail genes uu. [hh/uu]

When chirr breed, there are four possible outcomes per gene. Take this example of a female pure-breed plains chirr breeding with a male pure-breed mountain chirr.

  P p
m Pm pm
  S s
n Sn sn

Possible ear genes for offspring are: PM, Pm, pM, and pm
Possible tail genes for offspring are: SN, Sn, sN, and sn

The mother’s genes are always written first. In cases where one allele is dominant and the other recessive, the dominant allele is the one that expresses(is shown) on the child. They still carry the recessive gene, however. If a child inherits two different dominant alleles, it will express the father’s half, and if a child inherits two different recessive alleles, it will express the mother’s half.

For instance, if the child from above ends up with PM/sn as their genes, it will have mountain ears and a plains tail.
Let’s say this child is female, and breeds with a male pure-breed forest chirr (that is, Ff/Tt).

  P M
f Pf Mf
  s n
T sT nT
t st nt

Possible ear genes for offspring are: PF, MF, Pf, and Mf
Possible tail genes for offspring are: sT, nT, st, and nt

So, if a child inherited MF and and st, it will have Forest ears(from father), and mountain tail(from mother–even though the mother does not express this trait herself!

And so on and so forth, as breeding continues.

Color will be determined by generating a blending ramp and rolling; markings each have a 50% chance to pass down; wings have a 1% chance to pass down. Clothing does not inherit.