I found an almost empty bag of chicago popcorn mix that my ex-dog loved to eat with me. He got the cheese kind and I ate the caramel. I forgot I still had some left. As soon as he smelled (I guess - or heard it - he would come from where ever he was) it he would come and sit on my feet and wait for me to feed it to him - one for him and one for me until the little bowl I used for it was empty. Cheesy popcorn and bananas were his special favorite treats.
On the other hand - pup just got a new treat that he thought was okay - he ate it but not with the glee/obsession of exdog.