Complex sentence: Studies of microscopic tooth wear show that juvenile sauropods had diets that differed from their adult counterpart; so herding together would not have been as productive as herding separately, where individual herd members could forage in a coordinated way.
Split into simpler sentences: Studies of microscopic tooth wear show that juvenile sauropods had diets that differed from their adult counterparts. Differing tooth wear suggests that juveniles had different feeding strategies than adults, so herding together would not have been as productive as herding separately, where individual herd members could forage in a coordinated way.