How effective is an internal animal welfare feebate?

Effective animal welfare campaigns target food sectors that use small animals such as chickens, fish and shrimp (cfr. cage free eggs, shrimp welfare campaigns). Those campaigns are often institutional, meaning that they aim for institutional change (cfr. corporate campaigns) instead of individual behavior change. But those most effective campaigns are welfarist (reducing the intensity of animal suffering of farmed animals), instead of reductionist (reducing the number of farmed animals used for food). Based on the success of corporate campaigns such as cage free eggs, I am looking for the most effective reductionist institutional campaigns for animal welfare. 

One suggestion is an internal animal welfare feebate: a fee (tax) on animal products combined with a budget neutral rebate (subsidy) on animal-free alternatives, at the level of a company such as a supermarket. How effective is a campaign for a feebate on fillet, i.e. a 2 euro/kg fee on chicken fillet and subsidy on the tastiest plant-based chicken(less) fillets? What are the pros and cons of such a feebate system? How feasible is it? How can one mitigate the cons and make it more feasible?