[matese]

I am so happy you still have Whimsy and have had time to work with him. As far as treat training, you can use his food as a treat, example, lets say you feed a daily 1/2 cup of kibble, from that 1/2 a cup take 10 pieces out for training treats, this way you are not adding extra calories to his diet. Frozen green cut beans is another treat that most dogs love and there are no calories in the green beans. Boiled boneless chicken is another no calorie treat that dogs just love. Frozen broccoli and cauliflower more calorie free treats.
Undoing all the negative training by several trainers will take much time to undo, you must be committed and consistency is key in retraining, changes will not come over night, everything is baby steps, what we see as tiny changes is major changes even if it took months of work on your part, it shows you are making progress.

I am very sad to read Whimsy may have kidney disease, but on the flip side, this could be an added cause of his aggressive behavior...pain. There is treatment for kidney disease if that is what Whimsy has.

Please keep us posted after Mondays ultrasound.
And, thank you for this update.