How about a handcrafted stoneware coffee mug from Petrageous Designs, proclaiming the "dog lover" status in elegant neutral and black.
This is a generously large 20-oz size mug with a handle you can actually get a handle on, for a good solid hold on your morning coffee as you stroll about the yard with your busy pooch.
Make the gift just that little bit even more special by stuffing it with a selection of freshly baked gourmet dog biscuits, made with ingredients that you could actually eat yourself if you wanted to! Mmm-mmm.
Bonus for the human: the mug is microwave and dishwasher safe.