First of all, if you are going to own a breed, at least learn how to spell it. Chihuahua. C-h-i-h-u-a-h-u-a.' Secondly , there is no such thing as a "fist" Chihuahua. Thirdly, you can google dog training and find all sorts of helpful information, or go to your local library. And fourthly, cezcal, is this you ?
"No Matter how little money and how few possessions, you own, having a dog makes you rich." - Louis Sabin
yes lots of info on the internet on teaching that, I found you just really need the time and patience, teach one thing at a time for short periods so they don't lose interest, always use the same word when giving the command as well as the dogs name, and giving lots of praise and a treat when they get it right - you'd be surprised how quickly they learn - a bit like kids (if you have any) - shame you can't use reverse psychology on them too!!