You have to have the receipt and it has to be within 12 to 24 hours.
It depends on when you purchased them, if they're feeders it should be on your receipt. I believe however as long as you have your receipt and it's less than 24 hours they'll take them back.
Not sure on that one. Give them a call, someone there will be better able to assist you.
Thanks! Your answer is awaiting moderation.