http://www.dogster.com/answers/question/going_tubing_in_the_summer_on_a_river-57430 He has a life jacket. We will be floating on inner tubes and ive seen people with homemade looking tubes theyve attached a bottom to so your butt doesnt scrape rock. i want something like that for my dog to sit in that he cant puncture with his toenails. hell be atleast 30 lbs by then. This is a slow moving relaxing river, not like rafting. Just want to know if anyone knows how they attach bottoms to inner tubes. dont want to spend a fortune Asked by Hank en-us Copyright Dogster 2013 Sun, 19 May 2013 19:14:47 GMT Sun, May 19th 2013, 12:14 GMT http://blogs.law.harvard.edu/tech/rss Dogster.com dogsters@dogster.com dogsters@dogster.com