Sense of smell.

Sense of smell in Tigers is not as good as in Dogs. If a Tiger kill is shifted to 10-15 feet from its place where he was eating it first than it may take him few minutes to find the kill. They can smell it when it is close. Often we see cubs sniffing the ground to find out the scent mark of their mother from her pug marks. To get this scent mark they literally sniff the ground.
When this tiger was walking on this bank he found some typical smell of elephant dung which is more than 15 days old. He immediately sniff one lump and then second. 

So their sense of smell is not acute like dogs.