I think it would be neat to give the dinosaurs some play animations: something so that the dinosaurs do more than clip through each other, or use the existing Socializing behaviour.
To be a bit more sophisticated, species that share enclosures could get territorial about feeders, with alphas eating first, and possibly blocking members from another species from using the feeder till they have finished.
- Small carnivores practicing stalking behaviour on each other, with two outcomes - getting caught and running off, or successfully tackling another dino to the ground
- Pachycephalosaurus mock battling, butting heads at least once before separating (at the moment, the fights for dominance just end up with them staring at each other for a while)
- Ceratopsidae could also butt heads, mock fighting
- Sauropods could startle orthimimidae - neck bends down to nudge a small ground level dinosaur that then runs off
- Ankylosarous could strike trees or the ground with their tails occassionally
- Dinosaurs could chase each other, without kill animations
- Randomly, dinosaurs could become 'buddies' - two dinosaurs that tend to follow each other round, rather than their respective herds
- That would be an interesting mechanic alongside Social requirements - allow dinosaurs to accept other species towards their Social count, but that means that they have a Comfort penalty if you separate 'buddies'
- For example, a paddock might have an Iganodon herd that a lone Ankylosaurus joins
To be a bit more sophisticated, species that share enclosures could get territorial about feeders, with alphas eating first, and possibly blocking members from another species from using the feeder till they have finished.