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The incidence and type of congenital abnormalities occurring in a closed beagle colony over a 7-year period is recorded. Examination included 1 360 pups at birth, 758 of which were also autopsied at an age of about 20 months: 9 major abnormalities and 6 cases of cryptorchidism were found, an overall incidence of 1.1%.
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Marsboom et al. (1971) studied this question.
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