I've had this odd thought I wanted to get some input on.
I was thinking about the way I've used chasing my dog (and other animals) in an exagerrated, playful manner in various situations, and it occurs to me that I've never seen any of my animals display fear or uncertainty when I've come pretend-running down, waving my arms and/or crying "I'm gonna GETCHA!", not even from my flighty, wild animal, or my domestic bunnies. The least they'll do is calmly get out of my way or just stand there and try to ignore me if they don't want to play. But often, they seem to take on this role of pretend-prey. Penny especially will tuck what tail she has right in, put her ears back, and scamper away from me at the last minute, but she'll scamper in the same little steps I take as I'm pretend-chasing her, and then she'll stop as soon as she gets a little ahead of me, snap out of the "help, I'm running away from a big scary monster!" role, and wait all excited and playful until I catch up, then she does her running away thing again. I've seen the same thing from the bunnies and Kit, and even cats every now and then.
I think it's peculiar and interesting that they can assume this role of prey running away while obviously being very comfortable with the situation and being in play mode. It's like they get the whole pretend nature of the game and are playing along. But then, when I think about it, I know that their body language while being pretend-prey is different to when they really are feeling like prey and are frightened. Kit's ears and eyes are very expressive, and when he runs away during play, his ears don't sit as far back as they do when he's running away for real, and his eyes are more relaxed. When he's really afraid, they bug out, but when he's just playing, they stay soft, sort of. Penny's ears are slightly different as well, and both of them don't run as fast as they can, or anywhere near it. They both seem to take little steps so they won't get too far ahead of the one chasing them, although Kit often gets carried away if there's room and stretches his legs. I think it makes him feel smug to outrun his pursuers so easily
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What do people think of this? Do people see their own dogs engaging in roleplay of some sort, and how does their body language differ from playing a role and living it for real?