As sallyanne said blood in the poo is not normal and it won't have anything to do with a new home. Has the pup had a bone at all?? The reason i ask is because the other week my 7mth AB had drops of blood in his poo then he was sick this was when we noticed sharp bits of bone in it that he had not chewed properly, and this had caused him to (slightly) cut his back passage this caused the blood.

Just a thought

Colette