I groom ZoE, so there's no costs other than the start up supplies.
But as a few of you pointed out, I'm actually saving LOTS of money by doing it myself...so I shouldn't feel guilty about the fact that I ordered her a leopard print coat today, cos it was just the price of an average grooming session, and so as I groom her myself, it was basically free! A free coat! Awesome!!!
I just love rationalizing purchases
