Help Me I've Started Another WIP

So I started this cute little dog sweater, thinking that poor chihuaha next door was certainly going to need a sweater soon. Then I realized that Christmas is coming so I'd better cast on for my sons' presents and started Liam by Debbie Bliss. But then it was time to go on vacation to Curacao (pronounced keer'-a-sow and is a different place than Caracas), and who could possibly take a heavy wool sweater to knit on the beach? Not I! So I cast on for the Printed Silk Cardigan from Interweave Knits that I've been meaning to get to all summer. So now I have the back and 1/2 the front done on the dog sweater, the front done on Liam, and 3/4 the back done on the Printed Silk Cardigan. And now that I'm home, which one to pick up next?! Argh!