This kind of defeats the purpose of it to my mind! We stuff it with biscuits and peanut butter and sometimes freeze it if we are feeling mean... but we can go out the house with a fresh kong in front of the dog, come home and it's not been touched. Dog is usually up to one of 2 activities. Destroying their bed or sleeping on the sofa. When we are home she devours the stuffed kong as if we don't feed her.
I don't have a lazy/daft dog, she's a rescued border collie cross she's just really odd around treats and toys. Any ideas of how to get her to engage with her toys?