Every now and then our male beagles leaves a really strong smelling brownish discharge on things. It's often on the arm of the sofa where he rests his head but today it's on my bed. It's a very strong smell when you get up close but not a poo smell at all. I have no idea what part of his body it comes from but seems implausible that it's his back end on the sofa arm.
Does anyone know what it might be and whether I need to do anything about it? Pic attached of this morning's patch.