[DvlshAngel985]

You're going to have to stop Mork from running under Gizmo. Gizmo can't really stop himself in those situations. However, if Gizmo is seeking out marking your other pets, you have to step in and stop him. There is usually a sign, like intense sniffing, that let's you know he's about to mark. As soon as you see that, you have to correct and redirect Gizmo. I'm like you. If Kaji is sniffing up a tree getting ready to mark, I let it go. If Kaji is sniffing up one of our foster friends or our foster friend's bed, I'm right there to correct the behavior. I'm assuming there is also some marking going on indoors, right? When inside limit Gizmo's free roam until you trust him 100%. When he does get to wander, you have to be there to give him your full attention. As soon as he does the intense sniffing, stop him. The belly bad helps because it stops Gizmo from completing his mission. It will help get your point across that inside everything off limits.