They don't !
Destroy it. They need to chew constantly to curtail tooth growth. They chew their way into attics, leaving holes which will allow water and other vermin to get in as well, they shred your insulation for nesting material, they urinate and deficate where they're nesting, they breed, etc. They may also chew into wiring, causing a fire hazard. No matter how "cute" you think they are, they are a nuisance and a danger once they've found their way into your home.
No
because squirrels are very greedy animals and god wanted them that way. ANSWER: squirrels fight for land because that's where they put their stored food supply.
first chew
To chew on it.
Yes, there are a variety of squirrels that live in the desert, especially ground squirrels.
Another way to chew noisily is to smack your lips and slurp while eating. This can create a loud and disruptive sound while chewing.
No way
Dialysis.
Grass is really hard to digest so they have to chew down the cell wall of the plant to digest it otherwise it'll come out exactly the way it was when it was eaten.
Squirrels may perform these actions as a way of playful interaction or to establish dominance within their group. Jumping over or doing backflips can also serve as a form of agility training and coordination practice for squirrels.
It's there instinct. they are born that way