Pokémon GO is all the hype right now, and lots of people are enjoying playing it, but there is a substantially high number of people who are upset with the removal of the Footsteps feature in the game, and even more-so game developer Niantic's decision to start shutting down real-time Pokémon trackers.
If you're having trouble finding the Pokémon you want after the update that removed Footsteps, you might consider trying a crowdsourced Pokémon tracker app instead of one that relies on Niantic's servers to feed information.