We trained our Yorkie to go outside to relieve herself, and after a long time of training, she is doing very well at only going outside. Unfortunately, we have a severe flea problem in the woods near our house, and she gets fleas every time she goes outside. No amount of flea medicine, flea/tick collars, shampoos, etc. has worked. This is causing problems with her skin and negatively affecting her overall health. We think that training her to use puppy pads might be our only option, but we don't know how to begin to do that after spending so long teaching her that it is never acceptable to relieve herself in the house. Any suggestions?