He is so cute!
It could be something in the environment that is causing the itching too. How much are you feeding, cut back a little on the amount in each meal and see if that helps with the soft stool
Here is a good guideline for feeding:
8 weeks 1/2 cup 3 times a day
12 weeks 2/3 to 3/4 cup 3 times a day
4 & 5 months3/4 cup 3 times a day
6 months to 1 year 1.25 to 1.5 cups twice a day