I am having a major issue with the poodle. He is 10 years old, we got him when he was 4 from a rescue group. He was my mom's dog and before she passed she made me promise I'd take care of him. So get ready for every owner's worst nightmare: 1. This dog marks...on everything. He is potty-trained but refuses to tell me he needs to go until it's too late. 2. He bites. If you try to clip him, trim his toenails, turn him on his back...he will bite and it's not a tiny bite either. It makes you bleed. 3. He will only be around you when he wants something. He is a mooch...plain and simple. If he wanted to be around you to be around you I'd love it, but he doesn't want anything to do with you unless you've got something he wants, is jealous of the other dog or are leaving. Which leads me to: 4. He apparently has separation anxiety issues? He whines. AWFUL. When you're leaving or coming back. Inbetween he is in his crate and is happy. He and the Shih Tzu share the crate. 5. He's a sneak...he'll sneak anything he can away from you. 6. He will RUN out the door and not come back until HE is ready. We have tried training, shock collars, invisible fences, door blockers....I'm at a loss as to what to do on him with this. I have gotten rescues through every dog I've ever owned. Why is he like this? He still enjoys humping my poor Shih Tzu even though he is neutered, so I have a feeling he was used as a stud dog. Any ideas on how to curttail some of these things? I pretty much just leave him inside the crate when I see him on his "roving" expeditions to try and steal something.