I just bought my 3 cats a large bed, but none of them liked it, they like my lap better. So I gave it to my son for his kittens and THEY love it! So no $ wasted on it :)

A friend gave me the idea for dog beds stuffed with quilter's scraps, crumbs and thread snips.. The outer covers I made from flannel sewn envelope-style, closed with velcro. Sold these at a craft sale.

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I think you are talking about my post this year. These beds are sooo easy to make! I've made them for our Lab Grand Puppies and for our cats. You can make any size depending on the diameter of your cut. They wash and fluff very easily.

I buy 5# Boxes of fiber fil @ JoAnn's with coupons. I have made so many of these and every pet that has been gifted with one, whether they are large or small animals they love them. We've made them for local shelters too.

What I've learned is you need to OVERSTUFF with the filling as all the pets love to 'nest' in them. We call these beds 'Muffins' in our house.

http://www.quiltingboard.com/general-chit-chat-non-quilting-talk-f7/super-easy-~-wonderful-cat-dog-bed-tutorial-t181138.html

http://www.craftster.org/forum/index.php?topic=236744.0

I'm not sure why these aren't showing up as links but just copy and paste and it should take you to the post and directions.
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Not being much of a sewer, I line my dogs crate with several layers of old blankets, fleece, etc then top with an old king bed pillow wrapped in several extra large terry towels sewn together lengthwise. Easy to remove and wash, plus cushy and snug, my pugs love it. I drape several more old blankets on top of the crate and down the sides, and it creates a cozy little den.

I hope you don't mind but here is one more picture of Kip-Purr our Yellow Tom Cat in his 'Muffin'

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I know you want to make a pet bed but Costco has wonderful big dog beds for under $20.00.