Eyrie of the Stars said:

I wasn't around before EEE, but I've had a breed up project of my own for several years, so I think I have a handle on the training for PPPs (and EPP combos which train basically the same). Any that are worth keeping should have a wk 4 and 5 that's about like a weak EEE. Anything up wk 4 is great (though nothing up is fine) as long as they're at least 5/6 wk 5.

After that, the length of a training cycle is the best measure of strength. EEE-WWW more or less have a 4 week training cycle, where wk 8 and 12 are the same as wk 4, wk 9 and 13 are the same as wk 5, etc. Weaker PPPs have a 5-6 wk training cycle, where they won't repeat their wk 4 until wk 9 or 10. The closer they get to that 4 week cycle, the stronger they are. For this reason I usually track out to wk 20, so I can get a better picture of their cycle.

Right now my keepers have to be 5/6+ wk 5, all up by wk 6, 3/6+ wk 9, all up by wk 10 (will allow 5/6 if they've produced well), 4/6+ wk 14, no 3s at wk 16, and no 4s at wk 20 (will allow 1 with good production). The wk 9 and 14 requirements are kind of subjective based on where my herd is now, but the other ones have been longstanding.

This is probably the strongest PPP-EPP combo I have in my barns, since she's the only one that's gotten to all 5s by wk 18, but I have plenty that have fairly comparable training from wk 8 to wk 16.

https://horseeden.com/horse.php?id=34725516

This is an example of a weaker PPP. She drops several bars wk 9 and is still down 1 wk 10. Her wk 13 is the same as wk 9, but then she drops several bars wk 14 and 15. She loses another bar wk 17 and her wk 18 is only the same as wk 9 and 13.

https://horseeden.com/horse.php?id=36616271