I think you're going after just meat when you should be going after all manufactured foods. Meat prices are kept low in part by the same sort of subsidies that keep poptarts, fruit rollups, and white bread cheap. Force meat to be an expensive product, let the animals live on large tracts of land, eating naturally with minimal assistance, and deal with the occasional predation or with the additional effort to protect your animals from predation.

Taxing meat as we have now hurts the consumers and lets the manufacturers continue with wasteful, unethical, and harmful practices.