I feed my two Wellness small breed. Since yours is a year old then you could feed him that too. Just be sure to gradually switch so he doesn't have tummy issues.
Shampoo: I like Bio-groom Fluffy Puppy and Bio-groom Silk Cond. I've tried a lot, my two have more products than I do...and I Love products! Bio-groom seems to work best for me.
Congrats on your new baby!