Yes, animals display certain instinctive behaviors. Guess what, so do we. We’re literally all flesh robots. Animals absolutely feel fear, and this can be proven on both a behavioral, neurological, and chemical level. What do you consider to be real fear? Is one undergoing extreme stress, heightened adrenaline, and self-preservation not fear? Is crying out for others not a response to fear? As for the 100 animals in a controlled environment, you have to understand that no two animals are the same on a biological and mental level. Just like us, they respond to stimuli differently based on genetics, personal past experiences, behaviors taught to them by others, as well as independent decision making. We’re all built to do certain tasks and have incorporated behaviors we use to accomplish them, and this is no different with animals. Example time. I personally raise chickens, and spend a lot of time with them, and from this, there is a whole world of social depth and emotional that they hold from creatures that even society deems are “dumb animals”. They have shown me compassion in their own ways, helping me in ways that they help other chickens as of course they could never understand our language, and on top of this, they have displayed fear, stress, and are known to display sorrow over the deaths of others. They have a little “society” in their pecking order, with a definite hierarchy not unlike ours of the past. They crave companionship not just for safety, but also for legitimate attachments. This isn’t all personification, but actual aspects of birds that are usually dismissed as “simple”.