Very descriptive, I like it! But, in the beginning (maybe this is just me being brain dead, but) I thought that summer was the season and was extremely confused! You might want to sort that out, and make sure the reader knows that Summer is a dog. (I thought that it was the season, and that you were overly using personification.)
What really knocks me out is a book that, when you're all done reading it, you wish the author that wrote it was a terrific friend of yours and you could call him up on the phone whenever you felt like it. That doesn't happen much, though. — J.D. Salinger, The Catcher in the Rye