Pedigree Query

Byron
Breeding values have made huge increases in productivity in sheep cattle and pig breeds.
If these values were to work worldwide would you not have to make allowances for the US racing using drugs that are banned everywhere else ie lasix .As this is not a fair comparison .

My mares 8 th dam is Miss Matty who is the dam of the influential sire Papyrus .
Should i be looking for stallion who are infused with his bloodlines .Or is it to far removed .
Princequillo , Round Table, Star Kingdom are a few of the top of my head .