I thought if a carrier was bred it could produce carriers...And you would have to test all the puppies to see which were carriers..???   Is this not right?

 

Can anyone answer this?  If a carrier is bred to a non carrier,  does it produce possible carriers...Would yu have to test the puppies to see if there are carriers?

At least two of the bitches in a litter I bred are carriers.  This is the reply I got from Dr. Casal's assistant at the U of P when I asked the same question:

To answer inheritance patternwhen a carrier is bred to a known normal, we would expect about half of the puppies to be carriers. But keep in mind, that nothing is a given; some litters could be half carriers and half normal; some litters could be all carriers; some litters could be all normal. For an example scenario, a normal dog and a carrier are bred on two occasions and the dam births two litters of five puppies each. It is possible that in the first litter, all five puppies could be normal and in the second litter, all five puppies could be carriers. In this example, we still observe a total incidence of 50% carriers and 50% normal.

Therefore, the only way to be certain of a dog's status is to test each dog. We can offer a price break if you are testing several dogs in a litter.

Lis Evans
 

Hope this is helpful.

Valerie 

Thank you.