I have a dachshund who will not actively play with toys. She will, very rarely, pick up a bone or a chew toy (mostly a bone). She has a myriad of toys available to her, ranging from small, fluffy, squeeky toys, to large rubber rings, a coupled stuffed animals, some rubber chew toys shaped like food, ropes for tugging, some kongs, etc. She has some small circular bones available and a long bone. No rawhides, no pig ears, no hooves. 99.9% of the time, she ignores the majority of the toys she has available to her.
She does chase a bone if she's in the right mood, but will never fetch it back; she will either ignore the bone one she arrives, or will pick it up, walk to another location to chew it, and leave the bone there when called to play again. That is the only play activity she seems to interact with; she won't go after a toy if thrown.
When I leave her, I break up a dog treat to fill a dog puzzle, which is always "solved" less than 5 minutes of my departure. I leave the TV on for her when I go out.
She loves to be by my side and pursues any cat or squirrel that enters the yard. She actively patrols our yard for intruders. She likes to lay on her back in the sun. She is very intelligent; she always seems to know exactly what I want her to do. She simply will not play, and I want her to be entertained when I am unable to play with her or when she's unable to go outside.
She does respond well to treats and food, but I don't want to overload her with treats as doxies are prone to getting overweight.
What can I do for her to keep her busy? How can I entice her to be interested in her toys?