Look for inbreeding:

Pedigree:

Heureka Z - ISJ 1.60m

Breeder:
Mareline: Holstein 8145
Bay mare - 1960 - Hann
ISJ 1.60m
1947 - Holst
1954 - Holst
1937 - Holst
1935 - Holst
1947 - Holst
1932 - Holst
1914 - Holst
1938 - Holst
unknown
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