Ellen...if you give me the horses name, I can send you the pedigree from horsestudbook which has all of the %'s broke down on each horse in the pedigree.
Example: This is Kittys pedigree from studbook...you can see the %'s of Arenosa in there...makes her 37% Arenosa. Although, there are several other horses there that are part of the Arenosa breeding that do not carry the Arenosa name...(this is actually from studbook).
Where are you getting 37% from? The only Arenosa in that pedigree is the sire's dam making the example here 25% Arenosa. To be considered part Arenosa among the Arenosa enthusiasts they need to be decended from something that Audrey Barrett
bred. In this example that would make Kewpie's Amada of Arenosa 100% Arenosa and her son Buckeye WCF Classic Magic 50% and his foals would inherit 25% from him.
Here is the pedigree for your pony Ellen:
------84342A KEWPIE DOLL'S DIABLO
---136965A KEWPIE'S KLASSIC KREATION OF ARENOSA
------134715A STORMY BREEZE OF REINBOW
151971A ESTABLO VALENTINO
------140904A KEWPIE'S PAPOSO OF ARENOSA
---145040A BRISTOL MARGARITA
------139868A KEWPIE'S PEARLITA OF ARENOSA
------138057A KEWPIE'S PANCHO VIA OF ARENOSA
---140550A PANCHO'S LITTLE HARVEY SR
------138379A KID'S ELLY DOLL SR
145199A MKK DIAMOND IN THE ROUGH
------136112A INKA RUE CADET'S KING 40.50"
---141521A INKA RUE HEIDI
------139363A INKA RUE MADONNA
Valentino is 100% making his foals 50% from him. Diamond is 25% from her grandsire Kewpie's Pancho Via of Arenosa meaning that Diamond's foals inhert 12.5% Arenosa breeding from her which makes your pony 62.5% Arenosa. The balance of the pedigree is primarily Lou-Ed and Wink's Showdeo Kid breeding.