According to Our world in data wild terrestrial mammals make up 2% of the total number of mammals (in biomass so it is not exactly headcount, but also includes

According to Our world in data wild terrestrial mammals make up 2% of the total number of mammals (in biomass so it is not exactly headcount, but also includes predators and rodents not strictly herbivores), while cattle, pigs, goats and sheep are >50%. So when looking at suffering you may want to take scale into account.