Sealed whole chicken in a bag has it been previously frozen?

I got a whole chicken from the supermarket and it's sealed in a plastic bag. I can't use it right now so I want to freeze it, however there looks to be allot of water swishing around in the bag. This makes me think it was previously frozen. Am I correct that I can't freeze it and have to use it now? There is nothing on the bag mentioning it was frozen or not.