They hunt for other animals.
One of the Arctic Foxes' main sources of food is the Lemming. When there are abundant lemmings the Fox has food to raise large litters and the population of Foxes increases. Similarly the numbers of Foxes that can be fed decreases when the lemming population declines because there is less food for the Foxes. Basically the population of any animal is controlled by its food supply.
From the food they eat.
Because Kit Foxes do not need to drink anything. Some of Kit Foxes food will not have very much liquid in it to keep them hydrated therefore hey will urinate on their food to get enough liquid into their system.
Foxes really are not a food source for humans.
Foxes pee on their food to mark their territory and deter other animals from stealing it. This behavior helps them establish dominance and protect their food source.
Only by eating other food would foxes eat bacteria.
food
yes
They hunt small animals for food.
no
Because in a simple food web there is no room for adapton and change like there is for a complex food chain. For example, lets say the world was only rabbits and foxes. now the foxes eat all the rabbits and the rabbits become exctinct. So sow with the foxes only source of food gone, they'll starve to death, which in turn, causes the world to turn into an empty wasteland. But with a complex food chain, was as is, the foxes would have mere to prey on which would save the rabbits and the foxes. I hope i helped...
No, the Antarctic has a very cold climate and has no terrestrial food chain to support Arctic foxes.