I believe that if you do not feel an animal's value is high enough to warrant veterinary treatment, then you should humanely euthanize it. Leaving it untreated is not an ethical option, and ethics ARE a part of running a good business.
Oh, and of course, it's ILLEGAL to fail to provide veterinary care for a sick or injured animal. Engaging in illegal activities, particularly animal neglect and cruelty, is a very bad business practice.
The value of the animal is not really the issue--when your business involves animals, you have to provide them with medical care if they need it. It doesn't matter if it's a $25,000 morph, or a $25 normal hatchling. Euthanizing the animal is a legal option, but leaving it alive without treatment is not.
So yes--it is simply part of the cost of doing business.