It depends on their age. Puppies sleep alot. If not eating often enough, dogs will sleep because of low blood sugar. Check the dog's diet to see if he is getting emough foood. If so, then they just need sleep.
It is above average, but everyone sleeps differently. Teenagers sleep much more than adults do, and many things can lead to fatigue and drowziness that can cause someone to sleep so much.
how much does a tiger sleep
To flatten the grass around them so they could sleep much similar to dogs
Dogs do always go to sleep because they do so much running and other things so they go to sleep to wake up and feel nice and rested reddy for a new day running.
Ducks typically sleep with one eye open, so they are always partially alert to potential dangers. They may rest intermittently throughout the day and night but are constantly alert for predators even while sleeping.
because they have small bladders
Well they cost about 350 to 600 dollars depending where you buy them
On average about 12-15 pounds (: but get a Maltese there MUCH better!
yes
YES!!!
yes,because they are dogs.
15 or 20
I am guessing you meant "How much do shitzus weigh". The average shitu wieghs about 9-16 lbs. But, i really depends on the dog.
They sleep so much because their intake if protein in their cat food.
carnivores
Because they haven't had as much sleep as you have and they need to catch up on their sleep and that is why the older they get the less they sleep beause they are getting caught up.
The amount of sleep may vary so much, although most of adults get restored after 5 to 8 hours of sleep.