Predators spooking other animals should not all be the same .... For example bears should not be spooked by bobcats or cougars .... You need to assign some kind of spook value and threat value to all animals . Then compare one animals spook levels with the other animals threat level to see if an animal will spook.
You (EW) may already have something like this and if you do then it's not working properly.. Or maybe your values need to be looked at and adjusted.
But in theory a bobcat would have a lower threat level than the spook levels of a bison or moose, so they would not be spooked by a bobcat. However a rabbit or turkey might have a lower spook level than the bobcats threat level so those animals would be spooked. Humans of course would have the highest threat level of any animal so we would spook all animals ....
Pretty straight forward really and would make the game world feel more real .....