If the animal is overeating, that could affect the plant population by a low abundance of pollination. If the animal is a human then many things can go wrong. Humans chop down plants which also hurts the animals eating them. It's like the pandas in China. Pandas have to eat a lot, which means their food source is already low. And with humans chopping down their homes it now only kills the plants, but it also kills the pandas.
Explanation: hunger can lead animals into eating plants which cause population issues. traveling through the forest and cutting through leaves and plants just to go hunt any animal can also cause issues to the plants population
