A relatively recent concept, dog sitting is where someone looks after your dog while you are away or runnign errands. House sitting has been available for eons of course and pet sitters are simply an extension of this! Dogs are a different concept from a house, as they obviously require looking after in a much more "hands on" kind of way, involving much more than just feeding time. Dog sitting involves a carer, quite literally, moving in leaving you to enjoy your holiday.
A very cost effective alternative to kennels, dog sitting is great if you have more than one dog. Pet sitters usually include walking, plus all the love and care they are used to. As well as holidays you can also use dog sitting if you work late, want to run errands or just take a two hour break.