Sounds like you are taking a lot of precautions. What does your vet say? You could also post this in the breeders' section. There are many knowledgeable members there.
__________________ Joanne  Eli  Chipper Eva  Snowboy Rosie(R.I.P. 1996-July 29, 2013) Cocoa(R.I.P 1998-April 26, 2012): |