An attempt at a Guide for Trait Purity

[Sara Franco]

Hello

I am working on a project to produce a line of pure Faux Puff - Cobalt, so I thought to share a guide on how to get a pure trait on a cat.

Of course there are easy ways for a CHANCE of pure, but how to get a 100% provable indisputable pure before you even birth the kitten? There are not many ways.

The options are:

1- When a trait is the most recessive, you can be sure it is a pure. If later something more recessive is released, you can prove that your line is older than this release.

2- You mate two hiders of the trait together and when the trait shows, then it is a pure, because that was the most recessive trait on both cats.

3- You mate a pure with a hider, but you need to get a pure first by Option 1 or 2

4- You mate 2 pures, but you need to get two pures first by the other options.

Option 1 is straightforward, so I will include an example of Option 2 and 3.
Option 4 is straightforward but after you make pures.

Making a pure using two hiders

1- Making the Two Hiders

There are different ways to make hiders, but some are clear and certain before birthing the kitten and some require further testing.

I listed all the possibilities of mating two cats in the document included in this thread KittyCatS Pairing & Outcome Reference, and marked the ones that give you a hider with certainty.

I don't think many checked the document when I posted it, but I think it is useful. I realize it looks coded but this way it is more compact, and I can explain it to anyone who is interested.

Anyway, in this example, I will use a starter (which is already a natural hider) to get more hiders:

Using starters with cats with dominant visible traits

Ideally, you find a trait in a starter, so you already have one hider.
And you mate it with a partner whose visible trait falls between the starter's visible and hidden traits on the chart. If the hidden trait does too, that is even better because you will get a hider no matter which trait the partner passes.

Why do the partner traits have to be more recessive to the visible trait on your hider (starter or not)?
Because that is the only way to make sure that the resulted kitten hides the hidden trait you seek not the visible, without having to test the kitten.

So, here is what I did in the below screenshot.
At the time I made this hider, I was testing if the Ocicat - Chocolate was dominant to the Faux Puff - Cobalt, but it is easier if you already know this information of course.



Now I have a hider but not the opposite sex, so I try to make another.
I prefer to make another anyway so I don't need to use a 0T kitty for the rest of the project.

Here is the 2nd hider:



Now I have two hiders I can mate together for a pure.

2- Mating the Two Hiders

If they give the hidden trait, it is 100% PURE because it came from both cats and it is the most recessive on both cats. Nothing else an hide behind it in this mating.

It is a 25% chance but I was lucky to get it at the first attempt.

I think that is a good time to say that this is the AC BC case on my document.

A = Most Dominant Trait on the pair together
B = More Recessive than A
C = More Recessive than B
D = More Recessive than C

So

A = Ocicat - Chocolate
B = Tiger! - Powder Blue
C= Faux Puff - Cobalt
No D because Faux Puff - Cobalt is in the pair twice.

This gives AB or AC or BC or CC. What I got here is CC.

Two letters together here mean Visible Hider. The first is the visible and the second is the hider.
So, for example AB means Ocicat - Chocolate hiding Tiger! - Powder Blue.





AB with AB would work too. The difference here is that the two dominant traits are the same. So, Ocicat - Chocolate would be A and Faux Puff - Cobalt is B and there is no C. Only two traits available in the pair in this case.
But as you see written in the previous screenshot, I don't prefer this case because l would lose the chance to get more indisputable hiders. But if you don't care to get more hiders, it works too.



Here is the kitten with pure Faux Puff - Cobalt that I got:



Now how to continue to make a whole line of this pure trait?

You can keep trying until you make two pures of the the opposite sex and mate them together but that could take long.

What I prefer is, after making one pure to
mate it with a hider
Its parent with the opposite sex is an available candidate, so I used that.

This is the AB BB case on my document
A = Ocicat - Chocolate
B = Faux Puff - Cobalt

Which gives AB or BB. What we want is BB, but if we get AB, it is a hider so still useful.



Why is this better than to keep mating the two hiders together?

It is a 50% chance instead of 25% and I only wait 2 weeks to be able to start on the pair and do not have to wait for another pure not knowing when it would come.

The possibilities here are:

1- 50% chance : I get the partner's dominant visible trait.
2- 50% chance : I get the trait I am working on. In this case it is PURE.
Because the pure cat definitely passed it and I know the hider did also because if it didn't, the kitten would show the dominant trait which is possibility 1.

I got possibility 1 today, but with this cute chubby face I could not be sad :



When I get possibility 2 with the the opposite sex, I will have two pures and could mate them together and get more pures.

And you can keep mating the hiders together at the same time if you have more two hiders, and one of the parings will get the 2nd pure eventually.

Note: If you mate a pure trait with a visible of the same trait hiding something else, that is not an indisputable pure (no matter how solid it may appear). That is only a chance.
but of course it could be a good way to get the trait visible with 100% chance if you don't care if it is pure or not.

This is the AA AB case on my document
A = Faux Puff - Cobalt (using it as an example here too)
B = Whatever your visible Faux Puff - Cobalt is hiding

This gives AA or AB. So ALWAYS the Faux Puff - Cobalt visible but might not be pure.

[Grace Winnfield]

I freaking love Genetics. Is there a way to pin posts or save them so we can refer back to this?

[KittyCats Resident]

(02-25-2026 06:49 AM)Grace Winnfield Wrote:  I freaking love Genetics. Is there a way to pin posts or save them so we can refer back to this?

You can "Subscribe to this thread" at the bottom of this page.

Afterwards you can access the subscribed threads in the "Subscribed Threads" section of your User CP
(link on top of every forum page or here: https://kittycats.ws/forum/usercp.php )

An alternative would be to create a folder in your browser's bookmark section and bookmark the threads to that folder.

[Sara Franco]

(02-25-2026 06:49 AM)Grace Winnfield Wrote:  I freaking love Genetics. Is there a way to pin posts or save them so we can refer back to this?

I do too . Thanks for appreciating the post . I can try to bump it when it goes off the first page.

[Grace Winnfield]

(02-25-2026 02:25 PM)KittyCats Resident Wrote:  

(02-25-2026 06:49 AM)Grace Winnfield Wrote:  I freaking love Genetics. Is there a way to pin posts or save them so we can refer back to this?

You can "Subscribe to this thread" at the bottom of this page.

Afterwards you can access the subscribed threads in the "Subscribed Threads" section of your User CP
(link on top of every forum page or here: https://kittycats.ws/forum/usercp.php )

An alternative would be to create a folder in your browser's bookmark section and bookmark the threads to that folder.

THANK you!!

[Sara Franco]

I found out today that I accidently created a line of Pure Pixie Equine ears, so I thought to use it as a quick example for purity.

You can see below that the Faux Cobalt with Destiney Skyline (The mom in the 1st picture. Will call her Skyline) and Godfrey (The dad in the 2nd picture)
both are hiding Pixie Equine as they do not show the ear and showed them when mated with Pixie Perfect, which is recessive to Pixie Equine.





I mated Godfrey and Skyline together many times to pull Fairy Dust from Skyline. The ears were not my target at all.

This is the AC BC case on my document.

A = Odyssey Rounded Boo Boo
B = Scotty Fold
C = Pixie Equine

This gives AB or AC or BC or CC.
What I got is CC: Pure Pixie Equine.




Here is their first pure Pixie Equine baby, Ellen, but it took me long to find out the ears were pure because I did not know it hid on both sides until a few hours ago.



Then I back-bred Ellen with her father Godfrey for the Fairy Dust

This is the AB (hider of B) BB (pure B) case on my document
A = Odyssey Rounded Boo Boo
B = Pixie Equine

This gives AB or BB.
What I got was BB: Pure Pixie Equine



Same here when I mated the granddaughter Elysia with her grandfather Godfrey:



3 Generations of Pure Pixie Equine: Ellen, Elysia, and Elvin, when all I wanted was the Faux Cobalt with the Fairy Dust .

I will keep some boxes for testing when more ears are released.

[Sara Franco]

I finally got possibility 2 today after 2 weeks of possibility 1. This kitten is a pure Faux Puff - Cobalt. The result of mating a pure with a hider:



Let me know If you have any questions.

(02-23-2026 04:42 PM)Sara Franco Wrote:  
Here is the kitten with pure Faux Puff - Cobalt that I got:



Now how to continue to make a whole line of this pure trait?

You can keep trying until you make two pures of the the opposite sex and mate them together but that could take long.

What I prefer is, after making one pure to
mate it with a hider
Its parent with the opposite sex is an available candidate, so I used that.

This is the AB BB case on my document
A = Ocicat - Chocolate
B = Faux Puff - Cobalt

Which gives AB or BB. What we want is BB, but if we get AB, it is a hider so still useful.



Why is this better than to keep mating the two hiders together?

It is a 50% chance instead of 25% and I only wait 2 weeks to be able to start on the pair and do not have to wait for another pure not knowing when it would come.

The possibilities here are:

1- 50% chance : I get the partner's dominant visible trait.
2- 50% chance : I get the trait I am working on. In this case it is PURE.
Because the pure cat definitely passed it and I know the hider did also because if it didn't, the kitten would show the dominant trait which is possibility 1.

I got possibility 1 today, but with this cute chubby face I could not be sad :



When I get possibility 2 with the the opposite sex, I will have two pures and could mate them together and get more pures.

And you can keep mating the hiders together at the same time if you have more two hiders, and one of the parings will get the 2nd pure eventually.

[Sara Franco]

An example of the use of pure traits in testing

This is Aqua, my pure Faux Puff - Cobalt whom I used as an example in this thread.



I mated him with a pure Burmilla - Chocolate Silver Shaded
(The fur was the most recessive when I had her parents, so the proof is through dates of births).

There were two possibilities:

1- I get Burmilla - Chocolate Silver Shaded and that would prove the Burmilla - Chocolate Silver Shaded is dominant to Faux Puff - Cobalt.
2- I get Faux Puff - Cobalt and that would prove the Faux Puff - Cobalt is dominant to Burmilla - Chocolate Silver Shaded.

I got possibility 1

The big advantage is both results would have been useful. It was so exciting waiting for a box that can't be useless .

This is this the baby: