It actually depends on what you have like a pig doesn't drink to much but cows on an average day drink about 40 gallons.
I think about 5 gallons
more then 250,000 gallons each day.
Camel?
The food they eat.
by drinking plenty of water
Maybe. Maybe not. Try it, then take the test and let us know. Honestly, was the THC worth having to drink 2 gallons of cranberry juice and 3 gallons of water afterwards ?
Most wild animals get water by simply drinking it from pools and streams. A few get it as moisture from plants they eat.
The rain
NO. You would not survive drinking that much water. Drinking a lot of water in a short time destroys the body's chemical balance. Drinking 3 quarts in a day could be dangerous; and five gallons is 20 quarts.
maybe... if you can manage to get 4 gallons of water into your system fast enough. i would be more worried about killing yourself by hyperhydrating. the danger in drinking too much water is that you strip all of the electrolytes out of your cells.. without electrolytes cells do not work and you will die.
they have adapted in life by drinking water and to be safe
They get water from the fluids of other animals, eating plants aka/ drinking the moisture on the plants aka cactus, or if there is rain.