So, a little back story: We got Marvel at 8 weeks from a woman who rescued him and his brother from the inside of a dumpster. Things were great when he was little. When he started growing and was about 2 months old or somewhere around there, he started using my oldest son (who will be 5) as a play toy or possibly saw him like a litter mate. He would bite him quite hard. It was like I had to reteach him bite inhibition. So I did. Then he would run and literally jump on my son. I corrected that problem by showing Marvel that, I guess in a way, my son belongs to me. When he would do it, I would quickly get up, remove him from my son, and make him back up, putting myself between the two, until Marvel sat down and relaxed and went to do his own thing. I also had my oldest take over his feeding times and making sure he always had water. The food is never left on the floor if he doesn't eat it within 10-15 minutes. My oldest was even walking him, but now that isn't happening either. Marvel has now become a puller on the leash to the point I couldn't walk him. I am only 5 foot 1 and 140 pounds. I bought the freedom no pull harness, which was suggested to me on here. That didn't help much either. He doesn't care if he is turned around, he just starts to drag me in that direction too. My husband was the only one he responded to with walking on a loose leash. He does just fine with him, but me, now, forget it. He just drags me. My husbands grandmother moved in with us about 2 months ago. She could no longer live by herself at 70 years old. I am a Certified Nursing Assistant, so I took on that job as well and quit the one I had so I could stay home. Little did we know, not only is she scared of Marvel (some incident with another dog when she was younger) but is allergic to him. She would break out in a rash every time he got too close to her or brushed up against something she touched. We ended up making him is own room in our basement. A puppy heaven with carpet, toys, bed, and everything we could think of to make him happy. No, we did not lock him away and forget him. We actually joined him. Yeah, I spent all my time in the basement with him, playing and cuddling until it was time for bed. As for exercise, the hubby took that over, and it was cleared with Marvel's vet, and was given the ok to take him out for short runs as long as it was on grass or something soft. Now, his grandmother is being sent to a rehabilitation center due to her declining health and Marvel once again, roams the whole house. Here is my problem and where I need help: We all went out the other day for a nice stroll. I pushed the youngest in his stroller, our oldest walked beside his dad and Marvel. Marvel kept turning around and nipping at my son. I thought, maybe he just wasn't comfortable with him being that close, so I asked my son to walk beside me. Marvel kept turning around and trying to drag my husband backwards, whining and starring at me son with this look I have never seen him have before. He was dead fixated on my son and getting to him. So, again, I tried something different. I had my oldest walk up in front of all of us. Again, Marvel whined and pulled until he was panting so heavily he looked like he had foam around his mouth. Stopping and waiting until he was calm didn't help and trying to calm him before he escalated didn't work either. So, once we got to our destination, the pet store, we stopped outside the door. My oldest's shoe came untied and we waited for him to catch up. We were all standing side by side, Marvel sitting beside my husband. When my son got to my side, Marvel lunged at him and nipped him on the cheek. He did break skin, but it barely bled. My son automatically jumped started crying and screaming, the husband yanked Marvel backwards, and I got in between them. I have NO IDEA why he did that! Not a clue! I taught my son "no talk, no touch, no eye contact" a while ago when approaching Marvel because of how excited he gets when my son is around. Now, Marvel is even charging our youngest's play pen when he is in it. He won't stop. He will ram it with his head, paw at it like he is digging, and whine. I literally have to remove him from the room until he calms down. Now another problem: My husband will now only be home on the weekends. He is at the police academy until December. We will only see him Friday nights, Saturdays, and Sunday mornings. He said walking/running Marvel when he is home isn't a problem. BUT! I can not walk him! He pulls me everywhere and I DO not have the strength to control him. Plus, he now jumps up on me, nipping at my hands and arms. I do not know when the switch flipped and our lovable pup became so difficult. He used to walk on the leash just fine, spend time with our oldest without a problem once everything was fixed, loved to cuddle with the baby (supervised of course), and now, he doesn't want a thing to do with the boys. If my oldest gets too close, he jumps and nips at him, he tried to now lay on the baby and paw him like crazy, and now drags me everywhere! I know he needs exercised. I knew that when we got him. That I did not have a problem with. I have lost 10 pounds since we have had Marvel since I was the one who walked him daily. But, since I can not walk him, I am at a loss. I cam not handle him dragging me while I am trying to push the baby stroller! I looked and have not yet found a dog walker. And in my area, we do not have any doggy day cares unless I can drive 2 hours away. I have contacted a local dog trainer who is willing to do private lessons with me and Marvel and with him and my oldest, but his schedule isn't open until next month. I don't have a month! His energy level is going to sky rocket and my son is becoming scared of him! This, by the way, is the dog my psychiatrist wanted to see if we could get certified for me. I have an anxiety disorder and PTSD. Marvel was helping me so much and now taking him out in public is almost impossible unless my husband has the leash. As far as I know, Marvel hasn't been traumatized or scared on any way or abused. My boys are never aloud around him without me right there. Shoot, if I even go to the bathroom, I put him in his room until I return to be able to supervise. I am at a loss. I have no idea what happened or where we went wrong. My lovable 5 month old is becoming a holy terror! Any suggestions that I could try until I can get in to see the trainer? I do not like the idea of re-homing Marvel, but his actions towards my kids are beginning to make me wonder if he is going to be a dog more suited for a home without children. I love my boys, all three of them. Marvel is my furbaby. If this trainer can not help, I really don't know what to do.