Originally Posted by ANBshilling
Do you actually fill it or just line the inside of it? I can't get a spoon to fit in there! Seems like if you fill it up, they are eating a ton of treat for a few minutes before they get to the hard part.
I do both, depending on the day. If you are trying to line it and can't get a finger / knife in the hole, take a baggie and put a bit of the PB in one corner. Cut off the corner of the baggie and squeeze the PB into the kong (essentially you are making a poorman pastry bag). Only downside is you will waste a bit of PB as it sticks to the bag.