Test litters are normally radiographed at four to six weeks of age. A high-detail
A/P projection of the distal radius and ulna of one leg is needed of each puppy in
the litter. Several puppies may be included on one sheet of film, thus reducing
costs for the owner. Utilization of lead or leaded vinyl/rubber sheets as film
blockers (or close collimation) will avoid radiation fogging on multiple exposures.
The film should be clearly marked with the owner's name, name of sire, name of dam,
number of puppies in the litter, and date of birth of the puppies.
Any dead puppies that have been preserved by freezing should be radiographed at this time. These are frequently inconclusive due to age, however, and it should be understood they may not be included in statistical evaluation unless chondrodysplasia is clearly evident. [reference 8]
Radiographs must be evaluated by a professional who is familiar with chondrodysplasia, and the following information should be included.
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Copyright © 1999 Linda Dowdy, last revision 991022