More so than that, animals contribute in a positive way to vegetable production.

Chickens are great weeders. Sheep and goats graze down grassy areas (or woody if goats) including areas that are in rotation but currently fallow, so it doesn't need to be mowed down with fossil fuel machines. Pigs are great at rooting up uncultivated areas. And are wonderful waste disposal units. All livestock make great fertilizer. In the case of pigs and chickens at least they make great fertilizer out of stuff we consider garbage.

But yes, meat consumption likely must be curtailed significantly.