A dogs purpose

A Dogs Purpose by W. Bruce Cameron is, well, a really good book.
(if you want it click here, i highly recommend getting it: http://www.amazon.com/Dogs-Purpose-W-Bruce-Cameron/dp/0765326264/ref=sr_1_1?ie=UTF8&s=books&qid=1297389884&sr=8-1-catcorr)
Its about a dog who is first born feral, or in the wild, with his mother and 3 siblings, 2 brothers, 1 sister. They have to scavenge for food to stay alive. On an unfortunate day the dog catcher comes and brings him, his sister, mother, and brother to a pound which is in a womans backyard. They try running away but they are all captured and sadly, one of his brothers die of sickness. He is named Bailey and makes a friend (forgot her name sorry). Soon his mother runs away and his brother gets in a fight with a mean dog. Bailey tries to save him but he got hurt and his leg had to be amputated. He was put into a pound. No one adopted him and he was alone, one day the pound workers put him to sleep. He wakes up and soon is owned by a boy named Ethan. He lives a long life and dies of old age, and comes back to life as a girl dog that gets put into the K-9 unit. She saves several life when she loses her scent from toxic waste. The last rescue she had was rescuing a boy from the sewer, she than dies again from an old age. She wakes up again as a boy i think, and i'm up to that part so I don't know what happens.
The bad part is he isnt as enthusiastic when he goes back to life for the 3rd time, hes just a ponderer. Like a philosopher or something.
But overall I love the book.