Here are my suggestions:
The color of the top navigation links is pretty hard to read (color-wise). Older people (seniors) may especially have a hard time seeing it.
Perhaps a graphic at the bottom of the main page (that highlights or reiterates what services are offered would be a better option than providing a link to a Brochure PDF, which is probably not the most user-friendly option).
The Umbrella graphic on the front page is a bit big, and and pushes down the main text quite a bit. I'd suggest a bit bigger font for the text on the front page. If the store has a nice looking storefront, a picture of the store would fit well on the main page.
You could also create a map and directions to the store page and leave it on their site, then linking to a Mapquest link (perhaps in a new window) from that page. A picture of the front of the store may fit in well here as well.
Also, a few more "fun" pictures may help entice a person to use the services, such as dogs playing at daycare or cats being groomed.
I'd also suggest having the name, address, phone number, and contact email on the bottom of every page of the site.
Just a few suggestions, if anything I wrote doesn't make sense, or you want to discuss it further, just PM me.
