I have had many dogs come into rescue with giardia and I just had to made sure that I use gloves when I am cleaning up after the dog. Here are 3 websites that you can read about this disease. I would not get to concerned about it passing to you unless you touched the feces and didn't use soap and water afterwards.
http://www.peteducation.com/article....&articleid=739 http://www.cdc.gov/Ncidod/dpd/parasi...m#transmission http://www.priory.com/vet/giardia.htm
I will leave it up to the breeders to respond to your question regarding the breeders responsibility here.