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PT is not inheritable and it purely means showing ability, not breeding ability. Something it can possibly tell you though is the potential of the parents. If the parents can throw a high PT foal, they can throw a high breeding ability foal too. For example, parents that can throw 14 PT foals can throw **Star and **Gold foals too, but parents that can only throw as high as 10 PT can probably only throw foals as good as B and Red. (I'm not certain on the exact numbers for every PT score, but I used examples I'm pretty sure of.) But foals inherit those two traits separately, so just because a foal got a high PT doesn't mean it got equally high breeding ability. From the parents' potential to throw, a foal can get low breeding ability and low PT, or one high and one low, or high breeding ability and high PT. But one doesn't affect or tell you anything about the other.

IF 1 was a 9 and the other a 10.2 its just one additonal month of showing for them to level off ; depending on how well they placed while they were in training in each of the show classes, would determine the difference really.
Both of these Mares PT is a 9.8 but if you look even at 4 years old there is a huge difference in their "show scores" , most likely by the time they level off they will be equal how ever right now there is a huge difference and they are also half sibs.


LG2 Fireball 18539538

LG2 Fireball 18539537

yes most likely the "loser" will catch up, its also why you dont cull show horses til after 10 ; sometimes they take a bit longer to "mature" into better show horses.

Are you talking about in this situation which one do you keep?

"So, let's say we have two stud colts, their moms are both foundation and they share the same dad.
One colt is B and 9.8 the other is B and 10.0. Does that .2 point matter for much?"

I don't look at PT for breeding horses. If one tested superior to each other or to their sire, I keep that one to breed. Other one gets gelded. If both test superior, I keep the colt with geneticsthat are as close to ideal (in my barn, that means StySty DpDp, noW20, plus specific things to each line). I don't cull show horses as foals, I cull horses over 10 for their payout and make room for foals that way.

The biggest mistake people make when picking breeding stock is to care about PT. Papers, breeding advice and comparison testing are what matter for breeding. PT is not breeding ability and can't tell you about breeding ability.

"One colt is B and 9.8 the other is B and 10.0. Does that .2 point matter for much?"

You don't look at PT at all in this case if you are deciding which one to breed to. You comparison test.

Comparison testing is always cheaper than testing by breeding.