Know-How Exchange : Advertising/PR

I'm starting my pet sitting business next month (beginning of vacation season) I have a couple of fliers already printed and ready to go but I was trying to come up with one that is a little more eye catching to people that may not automatically look at bulletin boards. I came up with the idea to have a little dog yelling through a megaphone the word "Attention!" in big red letters across the top of the page. I want to have something to the affect of "vacation season is quickly approaching- line up your pet sitter now" but i'm having trouble wording it. Any ideas?