Western family of four kids and small dog looking for helper

Hi there!  We are a family of four kids (two boys aged 10 and 6 and twin girls aged 8) plus a yorkie looking for a caring helper.  We are hands on parents but we are looking for some assistance to make life a bit easier.  The main tasks will be housekeeping, babysitting and pet sitting, but we would also like you to be able to cook meals when we are out and go shopping and run errands for us.  We look forward to hearing from you.