Spell out the Prices
Customers like to be clear about pricing, it is one of the first things they are looking for. Too many websites hide the prices, being clear generates trust with the user.
Set out precisely what the charges cover and where there will be extra charges - for example badly matted coats, flea treatments or other special shampoos required.

Break Down the Charges
It helps if you break down the charges into chunks; for example under a Clipping heading you can have the short-legged terriers as one category, small coated breeds like Bichons and Shih Tzus as another and so on.
Small chunks are easier to read and absorb.

Prices for Specialisms
If you have any specialist skills, such as hand-stripping or show preparation list them separately as they are premium products.

Generating Extra Sales
Good quality products for coat care are rarely stocked in petshops. Selling the right products for your clients to maintain coat between appointments benefits you twice over - better kept coats requiring less work and extra sales for little effort.

Customer Offers
Perhaps you can encourage owners to care for the dog's coat between appointments or offer discounts for regular bookings.
Regular bookings are the backbone of the business and may well be worth giving a discount for, say, 6 bookings at 6 week intervals. Possibly the sixth grooming could be free?