Mismating and Pregnancy Termination (last article) http://www.lowchensaustralia.com/breeding/lostpregnancy.htm Two things known to sometimes cause a spontaneous abort: Dexamethasone - anti-inflammatory MLV (modified live) vaccines The mismate shot is evidently out of favor due to the increased risk of...

Ditto to what Glenda said!!! This pregnancy should be terminated ASAP. If you decide to continue the pregnancy, get her to the vet for a C-section the second she goes into labor (or earlier if the vet advises it). Early labor is likely with such a big father, so the survival of the pups is very questionable...