We have these that we got at Bed, Bath, & Beyond on sale for $14.99. They are ok, but not too tall. We use them so KS can get up and off of the couch. I need taller ones for our bed if we choose to do that. We have a tall bed. These are portable and we like them though. Can't beat the price too.
Animal Planet Pet Stairs - Bed Bath & Beyond
(they are on clearance for $12.99 now.) They are perfect for a Yorkie since they are lighter, but I don't think these would be good for a really heavy dog. But they work for us. Hope that helps some!
