I purchased Petgaurd Flea/Tick topical treatment at Sams Club, used it 3 times and ended up with fleas. I decided to get Frontline, since the other doesn't seem to o the job. Tomorrow will be 2 weeks since applying the Petgaurd, can I apply Frontline tomorrow? On Frontlines site it says to apply every 2 weeks for Ticks, so I'm thinking it's safe every 2 weeks, but the Petgaurd might be different.
Any ideas on this? I hate seeing him scratching all the time