I really hope they find out for sure what is wrong with Molly and get her all fixed up. Keep us updated!

That's unfortunately some of the problems with the low cost/free spay/neuter clinics. Most of them are done by several rotating vets volunteering their services, animals are basically done in an 'assembly line' fashion and since most of them have never seen the animal before they don't always know what's normal for each animal. Many of them don't do a pre-op exam or bloodwork (to keep costs down) and since many animals aren't vaccinated that have surgery sometimes diseases can be passed among the patients.

I think what they're trying to do is great, for both animals (to reduce overpopulation and mammary tumors, pyrometra etc) and for the owners who may have financial difficulties. However it does have drawbacks. As they say 'sometimes you get what you pay for'.Spaying in low cost clinic vs. vet hospital Question #7)

Incomplete spays are possible if the vet didn't get all the parts out. As for the HS lady saying 'there's no such thing as an incomplete spay' here are some articals on the subject...

By Antech (a large veterinary lab)

very short case notes published by AAHA (American Animal Hospital Association)

I found additional links to articals published by the JAVMA (Journal of American Veterinary Medical Association) however they were all pay per article.