I am looking at a TB mare to purchase, when I look up her pedigree this is at the bottom of the pedigree chart, Inbreeding:
Northern Dancer: 5S X 5D
Mr. Prospector: 5S X 4D
Secretariat: 3D X 5D
Would someone pls explain what this means? I am guessing the 5 means there are 5 instances of ND in the pedigree but what does the S and the D mean and why the ‘x’ ?
Is this a good thing or too much linebreeding?