I started nabbing up snuggies for dogs last year and now I've completed my collection and all 5 dogs have their very own snuggie.
I dearly love everything about the Snuggie including the package it comes in. I saved one and added it to my kitsch display on the mantle in my living room. The one and only "modern" item to make it there.
The kids seem to like the Snuggies fine:
Snuggies for dogs retail for between 5 and 15 dollars on Amazon and about the same on ebay. The sizing is a bit confusing and there is really very info on the site. Since its a blanket with sleeves that velcroes up the back there is a lot of wiggle room with the sizing. I got Mr. Tuvok an x-small, Fry and Ping smalls, Weasley a medium and Bob an x-large. They all fit well.
Stay warm and toasty!