My two new puppies, Bandit & Peanut will eat Rita's poop, not their own or each other's or the other two's, just her's. So, I keep a water bottle and pooper scooper handy, I spray them while trying to pick her's up before they get to it! I think I'd like to try the pineapple, it's gotts be easier. Does the pineapple have to be fresh or can it be canned?