Answer:
What calls for help, when written in capital letters, is the same forwards, backwards and upside down?
What can you keep after giving it to someone?
What has only two words, but thousands of letters?
What has no hands but might knock on your door, and if it does you better open up?
It can be clear like water, but it burns like fire.
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.