Welcome to YT, and to being owned and operated by a Yorkie!!!
It is not hard to spoil them is it??teehee!!
We usually bathe every 7 to 10 days here, and less in the winter when they are not outside as often and it is dry here.
I LOVE Espree Shampoos and in the winter especially, i use the Luxery remoistering conditioner to keep their coats looking and feeling healthy.
You can find some of the Espree shampoos at Petco. Or online