Ok, Im now trying to potty train my dog to go potty outside instead of using wee wee pads inside my home. I've never used bio-spot or advantage. From what I heard is Bio-spot is suppose to be really good and affordable. I know everyone uses advantage but it's really expensive. I know some people that also use frontline. I know it's alittle cheaper than advantage but bottom line what is good and cheap. I got this flea chart from dr. foster and smith and bio-spot is suppose to be better which im happy because it's only $6 compared to $40.00. http://www.drsfostersmith.com/pic/article.cfm?dept_id=0&siteid=12&acatid=176&aid=281 Any suggestions of what's better?