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Hamoth · 09-23-2005, 10:48 PM

CT (Collasped Trachea) defect is genetic, and herredity is assumed to be polygenic. The protien defficiency defect that leads to collapsed tracheas is usually not detected until age 7. Yet I have read tons of assurances that "reputable breeders are eliminating this and testing for the CT deficiency." Only problem is that there is no test for the CT defect (CTD). What then is being done in breeding circles to counteract the propagation of CT?

Since I'm a lay person, my interest is causual...I also lack background in this area, so I might also chance to ask: How old is a Yorkie bitch when retired from breeding?

09-23-2005, 10:48 PM	#1
Hamoth YT Addict Join Date: Apr 2005 Posts: 358	CT (Collapsed Tracheas) CT (Collasped Trachea) defect is genetic, and herredity is assumed to be polygenic. The protien defficiency defect that leads to collapsed tracheas is usually not detected until age 7. Yet I have read tons of assurances that "reputable breeders are eliminating this and testing for the CT deficiency." Only problem is that there is no test for the CT defect (CTD). What then is being done in breeding circles to counteract the propagation of CT? Since I'm a lay person, my interest is causual...I also lack background in this area, so I might also chance to ask: How old is a Yorkie bitch when retired from breeding?