Why Does My Dog Like Dirty Tissues. Let's say she's afraid of thunder. If your dog swallows a small amount of kleenex, it's not likely to hurt him.
They smell you in your used tissues, dirty underwear, and socks and because of this, they often consume them in a statement of ultimate rapture. Or it could also be because paper and tissues are so soft. However, pica can also be normal exploratory behavior according to the animal rescue.