Product review (5 stars): I went with this kids tunnel and it works great! My largest dog is 56 lbs but he's ...
I bought this as a training tunnel for my dogs (for teaching agility).  The tunnels for dog agility are way too expensive to buy one before you know how well your dogs will take to it. As an alternative, I went with this kids tunnel and it works great!  My largest dog is 56 lbs but he's on the short and stout side, so if you have a tall, lanky 56 lb dog, this tunnel might not be tall enough for them unless they bend their head down.  That said, it's serves my purpose very well.  It's easy to put up and take down and after two months, has held up well to rambunctious dogs running through and trying to turn around while in the middle of it.