Look for inbreeding:

Genealogy:

Ella

Breeder:
Mareline: Holstein 18B1
Light bay mare - 1968 - Holst | xx : 25%
1964 - Holst | xx : 50%
1945 - Holst
1960 - Holst | xx : 50%
1960 - Holst | xx : 50%
1941 - Holst
1940 - Holst
1947 - Holst
1938 - TB
1945 - Holst
1934 - Holst
Holst
1936 - Holst
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