Reckon you know your stuff when it comes to co-efficients of inbreeding (COI)? Have a go - or a guess... is it X, Y or Z?
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The answer is here... And if you got it wrong - or even if you got it right and are keen to learn more... there's a fantastic current offer from the Institute of Canine Biology.. a free online course - COI Bootcamp - for breeders.