You should hate the irresponsible dog owners who don’t care what damage their pets do! Any dog can kill and eat a tortoise, it’s an easy meal for them.
Hi, don't feel bad, one time my brother just purchased a baby Hermanns tortoise and he placed it on the kitchen floor not realizing his 80lb bull terrier was loose. He turned around for 5 seconds and the tortoise was gone. Hope yours will be ok!
They won't hibernate indoors when the heat is on in the winter but they will slow down. I use to hibernate mine outside in the North east as long as you keep them dry.