Poison Dart Frog

My poison dart frog will be very big and full of meat because it has food when the Amazon rainforest has not been taken down. But when the rainforest is taken down the animal will shrink and it will not be as big and bulky as it was whenever the rainforest Had food and trees and other stuff for the Frog to live and grow. And when the rainforest is full of meat and good food the poison dart frog can be about 2 in long but whenever the rainforest doesn't have food in the next 10 years then it will be like 1 cm or maybe even less.