Capybara Evolving

What can dodge, swim, and hide? A capybara. I think in the future that the rain forest is going to change into a desert. So that means in the future that the capybara might not be able to swim. They can stay under water for 5 minutes. I think that in the future they will increase in size and length. But it might have to adapt like camels because they will have to eat there on fat and get water from cacti. They will probably look like a tall tiger. They will eat bones. Right now they eat an adult capybara that can eat 6 to 8 pounds of grass per day. Also they eat reeds, grains, melons, and squashes. Right now they are 3.2-4.2 feet long and weigh 60-174. I think they will weigh less because they might not eat a lot in the desert.