1. Test whether dogs react more to smell or to their owner's attention to an object: they have to choose between a plate that smells more of food and a plate their owner paid attention to
2. Test whether dogs can follow their owner's gaze: owners call the dogs and then look somewhere and we see whether dogs follow this gaze (look up gaze-following, it's important for learning!)
3. Test whether birds can use tools: give bird a long stick and a box with a peanut inside and see if they can use the stick to get the peanut out
4. Test whether vision can develop in the absence of stimulus: bind kitten's eyes at birth and see if they'll develop perfect vision (they didn't...)
I would say that the nurse would have to intervene if the client say chose Campbell's soup as part of her diet as it is known to have high amounts of salt or crackers with salt on them or say savoury foods like stuffed olives.
