Frontline Top Spot was the first prescription drop from Frontline to come out. It only protects against fleas and ticks. Frontline PLus is a newer product that protects against fleas, ticks and repels mosquitos.
Both usually work and both are good. The Top Spot is generally cheaper though.
Thanks! I must've overlooked the mosquito part, lol. Maybe I'll ask about that when she needs more. I don't think we have a serious mosquito problem, but I don't think it would hurt to more "protection"
No, you didn't, Pebbies (I'm not sure where callaingsd is getting his/her information). Frontline Plus does not repel mosquitos. The difference between FL Top Spot and FL Plus is that FL Plus has an ingredient that breaks the flea cycle by killing eggs and larvae, along with killing adult fleas.