[imw]

Not GP, but US livestock subsidies total $50B since 1995: https://www.ewg.org/news-insights/news/2022/02/usda-livestoc...

I found this a useful primer on the form that those subsidies take: https://farm.ewg.org/subsidyprimer.php

(edited to clarify US scope)

[the_doctah]

The primer mentions nothing about livestock