Research Updates

Chinook Seizures

Chinook Cryptorchid

Chinook Cryptorchidism DNA Study
James A. Baker Institute, Cornell University, Ithaca NY

Cryptorchidism is the failure of one or both testes to descend into the scrotum.  Cryptorchidism is prevalent in the Chinook breed and impacts our breeding choices of otherwise quality Chinook males, thus limiting Chinook breeders’ options as well as the Chinook gene pool. 

Dr. Vicki N Meyers-Wallen at Cornell University’s James A. Baker Institute for Animal Health is looking for blood samples from Chinooks with cryptorchidism in order to identify the responsible genetic mutation and develop a test which will allow Chinook breeders to make informed choices and breed away from this disorder. 

Dr. Meyers-Wallen recommends that Chinook breeders check their puppies and document testicular decent.  Normal decent of the testicles occurs by six weeks of age and anything after six weeks is considered late descending.  Any abnormalities, such as late descent of one or both testicles, testicles that descend and retract, or the location of a retained testicle(s) found on neutering should be recorded, and reported when participating in this study.   

The most useful samples for this study are from an affected male, their sire and dam, and at least one full brother that is not affected.  If more brothers (affected or normal) or grandparents are available, these are also useful and should be included.  Cryptorchid males with no family members can also send in samples. 

To participate, all that is needed is a blood sample, a consent form and questionnaire, and a pedigree.  Blood is requested for this study because of the high quality of the DNA that can be extracted.  Unlike other Chinook studies, the blood sample should be frozen prior to shipping, and shipped to Cornell on Monday, Tuesday, or Wednesday.   Please see the following forms for additional information on participation:

Before sampling, Dr. Meyers-Wallen would like to know which family members will be submitted.  This may be coordinated by contacting Dr. Meyers-Wallen:  vnm@cornell.edu or through the CCA Health Chair, Nancy@chinookclubofamerica.org

 If you have a Chinook dog that qualifies for this canine cryptorchidism study, please participate!