I personally would not attempt shipping live animals on a Friday. With the least of the worries being that a Sat. delivery is more costly the big "WHAT IF" is what if something goes wrong and the package doesn't get delivered. The animals will have to sit somewhere on Sunday, you don't know what the temps are going to be where the package is stored and you can only hope that they will still be ok when they finally get to their destination. For me it's too risky and unfair for the animals as well as stressful on the shipper/receiver. Mon. thru Wed. are better days to ship IMHO.