To figure out the price of the vet fee, go to the page of the EC your mare is stabled in. Over to the right of the page will be a star graph. Hover over the "Health care" star bar and you will see what percent of prestige that EC has for health care.
take $600 minus the number you just discovered and that is how much you will pay.
My EC, for example, has a health care percentage of 80%
I pay $600-$80 for the vet, or $520.





