I fully understand the desire of consumers (being one myself) to deal with business that are competent at their trade, but their is a free market solution to this problem. If Mr. Hughes is properly motivated by this experience, I would suggest forming an association of dog groomers. These businesses would then have the option of being a part of this association. The businesses would be able to join this association by paying annual membership fees and displaying the seal of this association, which in return would require some form of approval, qualification set of standards. Informed consumers could choose to deal only with businesses that bear this seal or not. The association could pay for it's management costs with these membership fees and who knows, maybe Mr. Hughes could make a living doing it.
The benefit to this model is that nobody (the businesses nor the consumer) has lost their right to options or choices, which some of us still associate with freedom. Furthermore, we have avoided the pitfall of creating more government oversight which would likely saddle taxpayers, businesses and consumers with the unnecessary cost of implementing and enforcing such regulations.
Government is not the answer. It rarely ever is. I have a better option for you. Don't go to that groomer again. What you suggest could apply to any service business. Regulations are not necessary. If this business does not satisfy their customers, they will go out of business. That's the beauty of the free market.