flea medicine

So i'm pet sitting my mom's friend's dog and cat and I noticed that the dog had some fleas jumping on her. I went and told her owner and she told me where to find the flea ointment. The box I grabbed is Sentry Pro and I just learned today that Sentry Pro has been hospitalizing pets, and now I'm...

Hi guys, Since it's the beginning of the flea and tick season, any recommended flea medicine? What are you using? What should I avoid? BTW, I just found out this interesting infographic about fleas: How to Apply Flea Medicine | Best Flea Medicine For Dogs Did you know that a flea can bite...