Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: will a thirty pound dog fit in the medium size?
Document: My 40 pound Beagle just loves it. It is the perfect size for her. This trailer states it will hold a 90 pound dog...that will NEVER happen. This trailer is great for small dogs only. My Beagle just fits with a little room to more around and lay down. It would be nice if the front  wheel was on a swivel though. Over all we are very happy.
I love it and so does Jack. There are times he just jumps in and enjoys the ride. He is 25 lbs. so the medium size was perfect. Carrying him when he stopped walked wasn't doing my back any favors. I didn't realize it didn't have a brake when I bought it, But I problem solved by using a 36 in. bungee cord which I wound around the handle where it attaches to the body. Pull the hook down to catch on the wheel.
I use this medium size carrier for my chihuahua with ample room for his bed and have done three cycling trips so far and it has perform perfectly. The front wheel is easy to attach should you want to use it as a stroller only. It rolls effortlessly and comes with pole and safety flag and two small side pouches for additional items. I am totally pleased with this stroller and highly recomend it.
Based on the reasonable price, we assumed this trailer would not be quality-built. We couldn't have been more wrong. It is very solid, wheels are true, and provides a completely comfortable ride for our 15-pound dog. She loves it. We have used it for both jogging and riding bike. I am able to run using just one hand to steer it. When biking, we pull it behind an older mountain bike and you hardly know it's back there unless you are on a steep hill.
I love this - I havent used it as a stroller yet and I wish it folded up easier but my dog LOVES this bike rides. he took to it immediately. It is a comfortable ride, fit onto my bike w/ easy has nice big wheels for a smooth ride and is stable. The back refectors did fall off but that is b/c it got bounced on its backside when I was moving it.
We've only used it thus far as a stroller- it's very light weight and super easy to push & manuver.Anxious to hook it up to our bicycle for a ride. Very good quality and affordable. Sadie has plenty ofroom to stretch out and enjoy the comfy ride. Tire size makes a huge difference in the ride as comparedto other similar items.
SUPER easy to assemble and use right away. I was surprised how compact this folds up and easily fits in trunk of my Honda Fit. The material and structure of the Trailer is great and sturdy also. Feels solid and well balanced. My English Bull Terrier loves the rides and happy this was a safe and smart purchase. The hitch (to the bike) took less than 2 minutes to take off and is very easy to transfer.
So glad we took the chance on this instead of some of the other much more expensive options out there.We do make sure our dog still gets the exercise she needs, but now she can come along with us when we want to be active as well!
If you are looking for a combination stroller and trailer for your small dog, this is it. The frame is welded steel, the rims are real metal spokes, the stitching of the panels and overall workmanship is excellent. It sets up in just a few minutes and converts in seconds. You can pay a lot more for one of these, but you will not get any better quality for your money. Now, if she will ride in it. :-)
I especially love how strong and secure the leash clip inside is and that the sides have nice big mesh windows. Great price and Id highly recommend it to other people. I actually ordered two other brands peior to this one and returned both. Its very spacious my dog weighs 18 lbs and he can even lay and sprawl out if he wants and can sit upright w/o his head hitting top. ;-)
Answer: yes