Date change is not something that happens all the time, especially to a professional photographer. I am not a photographer myself but I have worked in a studio with professional photographers and it is not something that happens ALL THE TIME. Even if you edit a picture, the original data remains, like date picture was taken, opening of the lense, camera used, when the last editing took place, etc.
And I would like to know your opinion on what happened to the puppy to get SO thin in 48 hours, just your opinion on what happened nothing more.