Change of Heart question

I thought Shay sort of became a part of Claire and that was why she could bring the dog back to life.

That's exactly what I thought Reese, I think Jodi leaves her stories like that at the end so you can decide for yourself what happens and so that the book will stick with you :)

I agree with Reese. This was such a great story! Really had you thinking!

Taken from Jodi's website:
Is Shay the Messiah? Well, I have my doubts, personally–especially since you realize at the end that he was the one to break into Michael’s dorm room when Michael was in college. However, think of what Rabbi Bloom says–that there might be a Messiah in every generation, if the rest of us are smart enough to see it…and then think about the very last scene with Claire.