Dogs have to have meat to survive as well.
Guinea pigs I know eat vegetables. They love lettuce and carrots. My cousins 2 guinea pigs fight over the carrots he gives them.
This is what happens when you force ideologies on ANYTHING. Some animals need protein, as do humans. Hate to see what would happen if they had a kid and fed them a "vegan" diet.
Some people try to impose their veganism on babies; not giving them milk to drink, and the babies have to be taken to the hospital due to malnutrition, and the parents are like, "Wow, I had no idea!"
Guinea pigs I know eat vegetables. They love lettuce and carrots. My cousins 2 guinea pigs fight over the carrots he gives them.
Lion: *cough*