i do dog,cat, farm animals (horses, cows, goats, etc), birds, anything really. my prices are based on size, how many, and how long. if its exotic or sick (meaning it requires more time and special care of medicine) it cost a bit more.
if they are people i have worked with before i started my little "business' or family i take what ever they are willing to pay. my prices are more like "pay this or obo" lol