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Of course they do. Did we really need a study for that?
Your comment reads like a Facebook comment. That’s the whole point of science, don’t trust common sense, prove it.
Same for dogs. When my cat was killed, his dog-sister was in despairing grief for weeks. I’d hear her howling throughout the day, she stopped eating, and barely did anything all day. For the next few months, whenever she would hear/see a cat on tv or smell anything that belonged to the cat, she would get lively and attentive, as if her missing sibling was coming back. It was terrible to witness.
That’s sooo sad. And sweet. Awww…