 Jealousy
Wow, sorry for your problem and the passing of your Nala.
Apparently, Spike doesn't much like to share (food, toys, your attention, etc.) I agree with you that it's probably due to all the changes in his living arrangements. Seems to me I saw an episode of "It's Me or the Dog" with Victoria Stillwell that was not unlike your situation.
If I remember correctly, she segregated the dogs and worked with them individually to build their confidence (training them to focus on her at her command using positive reinforcement). Then she worked up to getting them within sight of each other, then in the same room, etc. Bad behavior resulted in segregation; good, calm behavior resulted in treats, being with the family, etc. It's a lot of work but unfortunately Spike is probably very stressed, anxious, and insecure, which is why he lashes out. If you can get him to calm down it would be a huge help.
I'm no dog trainer, anyone can feel free to correct me if I'm wrong, and I do sincerely hope you can get help for Spike. If not through your own training, then maybe you could consult a professional dog trainer. Good luck ! |