I switched Shiro from Frontline to Advantage because it was way cheaper and many people said it's better. Has anyone noticed that horrid and nauseating smell it has? I couldn't go near my dog for the first 2 days and it's still lingering. Also it only works for a couple weeks, then he gets fleas anyways. It's so annoying, isn't it supposed to protect for a month?

I do not apply it until 2 days after bath, and don't wash him for at least a week after, so I don't know what's going on. Maybe… Continue