Have you ever watched your dog sniff around in the park, and then suddenly lift his leg to pee somewhere? (happytailsspa-blog.com)
A warrantless search effected by a dog sniff of the exterior of a vehicle must be supported by reasonable suspicion. (cbaclelegalconnection.com)
You would use this when you catch your puppy in the act of sniffing at something that she may view as edible and you view as potentially nasty. (top-dogs-names.com)