My next-door neighbor has a pair of turtles, boy, they are CUTE!! They recognise people, and are happy to come out and visit. She fed them FLOWERS. Go figure.
But these are large desert turtles, so...like TKOP said, ID 'em, (Martoch's link is a helpful one

) .....and if I may add...I would think that the ENVIRONMENT would be the make-or-break consideration.
Good luck, MD.