You need to buy some of Oxbow's "Critical Care" as a handfeeding supplement. It's designed to be fed to herbivores which cannot eat for medical purposes in order to help pull them through.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry