NQ,
Jack already advised of the antibiotics before whelp to clean the mothers milk, no mention of only bitches prone to milk issues. And also he gave you references to the vet manuals he read before breeding dogs.
You can get the MERCK online for free at your fingertips http://www.merckvetmanual.com/mvm/index.html or buy a copy at the book store for $50+. This book pretty much covers everything.
Good luck with the survivor and momma, take care!
S_B
P.S. Sometimes we become complacent being experienced and over look small things. This discussion will help us all to be on our toes.