hi. my approximately 3 yr old basset, Daisy, has this annoying habit of taking bits of food and leaving it scattered on the floors throughout the house . sometimes she hides food in the folds of her blanket. what could cause her to do this?she doesn't eat the food she drops. she doesn't have to fight for access to the food bowl and she's well-fed. other than that we can handle all of her other "quirks".