The interesting thing about animals is that they never worry about where they're going to get their next meal. They never work on budgets or decide how much they can "spend" on food this month. Food is free for them. Everything is free for them, including where they lay their heads to rest. They have no money and they have no desire for it, and somehow, all of their needs are magically met.
There are only two exceptions to the above. Some animals who come into contact with humankind are subject to humankind's whims and ideas of property and money (not to mention mental illness), and therefore, can go hungry. Also, a severe winter can cause hardships among animals who cannot adapt. That's it. Those are the only exceptions.
Humankind is the only animal that "pays" to live on this Earth. We pay for food, housing, clothing, medical care, etc. The list goes on and on, and we are convinced we must work very, very hard for this money. But this is a free world. It was made free, and every creature who lives on it was meant to be free. The day everyone realizes that is the day the madness stops and evolution begins. Until that day, you will find me in this field.