Recognize Scent?

I think they recognize scent to a certain extent. They know the smell of food and predators. They learn that we are safe, and since each person smells different, I think they learn each person's scent.

I voted yes because Sherlock acts very differently depending on the handler. If it is me, he will stretch out completely and procede to crawl all over me. If it is my mom, he will stretch out but still act slightly nervous. When my sister is holding him, his neck curves up and he moves very slowly if at all. When my dad holds him, he balls.