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Jac · 02-29-2008, 01:09 AM

Hey, Ann Marie, I am not sure...all I know is that the T4 test is a blood test and that the Pawsitive ID checks DNA, so I don't know if it replaces the blood test or not...that is something we should find out though. Thanks!

Linz, that is one of the problems with OFA...and why I prefer PennHip. I plan to breed my females when they are mature enough to care for their litter, and when the are no longer puppies. That happens at different stages for different dogs. Since OFA is a preliminary test and can't be confirmed until 2 years of age, there is a chance that it could change. I prefer to have the PennHip result so that I am reasonably sure that the testing is accurate before I breed my dogs. But, many breeders use OFA prelims...it is a gamble and one of the things you factor in.

I would just caution all who use OFA prelims to be sure and follow up with the 2 year exam to be certain.

02-29-2008, 01:09 AM	#45 (permalink)
Jac Senior Member Join Date: Feb 2005 Location: northern California Posts: 9,243	Hey, Ann Marie, I am not sure...all I know is that the T4 test is a blood test and that the Pawsitive ID checks DNA, so I don't know if it replaces the blood test or not...that is something we should find out though. Thanks! Linz, that is one of the problems with OFA...and why I prefer PennHip. I plan to breed my females when they are mature enough to care for their litter, and when the are no longer puppies. That happens at different stages for different dogs. Since OFA is a preliminary test and can't be confirmed until 2 years of age, there is a chance that it could change. I prefer to have the PennHip result so that I am reasonably sure that the testing is accurate before I breed my dogs. But, many breeders use OFA prelims...it is a gamble and one of the things you factor in. I would just caution all who use OFA prelims to be sure and follow up with the 2 year exam to be certain.