We changed last week to a microbial rennet (2 drops to 1/4 c water), and also changed the culture to a florra danica (1/4 tsp).
We've also started to treat our heavy producing doe for subclinical lactational ketosis/ hypo calcemia with a propylene glycol drench. Our theory is her high production is placing a huge metabolic demand which is altering her calcium levels - which alters the proteins in her milk. We've had the milk tested last week and ruled everything else out.
It looks like we may have made some progress. The curd set up today! We should know tomorrow am if we finally have chèvre!