User blog comment:ASDFGirl/The Future of Fossils and Archeology: Revival/@comment-34429994-20180122050829/@comment-67.231.169.71-20180311034643

Well we can make an educated guess based on what we have found. It is likly that it was both a Quadreped and Biped as it could walk leisurly and wade for fish on four legs, but when it needed to run or was in a fight with another dinosaur it could stand on two legs. So Spino's Biped stance was likely either for emergency or speed perposes but would be on four legs when just walking or going about it's daily life. However I am still fine with the current FaA Spino. Speaking of that I love the speculation that it may not have a sail as a baby. :)