Dog Wheelchair for Back Legs - Lightweight Mobility Aid Cart for Small Dogs & Cats with Disabled Hind Legs - Adjustable Pet Wheelchair for Walking Assistance (Ideal for Post-Surgery Recovery & Daily Mobility Support)

Bought 8 different brands varying in prices from Amazon. They were either way too small, way too big or just didn't support my dog (a shih tzu) like I had hoped.My shih tzu is 15 years old. He's still full of spunk except he now has the 'sidewinder' walk. His hips just don't want to work for him. His dr says it's common in shih tzus as they age, arthritis gets into their hips. Otherwise, he's doing great.So, I ordered this, thinking 'well, if it doesn't fit I'll again have to send it back and try again'.Welp, I DONT have to send it back! Yay! It fits him perfectly.He's 24lbs, 17 inches from front paws to back paws. His backend is 8" wide.I got a MEDIUM size.It's perfect!Goes together so easily. Putting him in, was a breeze. And let me say, he isn't the easiest to put in because he squirms ha, but, this actually is so easy to put him in. :)I'm so glad this worked out for him.Not cheesy made and looks and feels sturdy. He went down the ramp with ease. :)Only downfall, the belly support (its one continuous piece) also covers his area. So, I had to take him out of it to go potty. A female would be able to without taking out of walker. I guess you could fashion an opening for a male dog, but I don't want to do any remodeling in case I goofed it up.But, if you're more crafty, you just might be able to. :)Around the chest/shoulders it's velcro, so it's easier to make it comfy without it being tight. And the side bars are NOT in his armpits (like a few I had sent back) the bars are definitely on the sides of his outer legs. Without rubbing. There's also a strap that clicks together at their shoulders with a metal loop for a leash to click onto. :)I'm happy, he's not thrilled haha BUT he also doesn't dislike it. It's new, so he's gotta learn how it can work for him. He isn't stressed using it and so that's another plus. :)