....when do you generally start using it for the season? I don't want them to get infected, but I don't want to use it for no real reason if it's not needed. I know it's going to vary based on living area....but a general idea.
I'm in Arizona and I use it every month in the autumn/early winter until about January and once every 3-4 months after that. We don't have a problem with fleas, it's the ticks that give us trouble here.
I'm in Oklahoma. We didn't really have much for a winter - but the weather is still going from warm to cold so I'm not sure if I should wait another month or so.
i'd start it now too, monthly. we've been seeing fleas for at least month, and have also begun to see ticks. also be sure to do your heartworm preventative every month. mosquitos are literally sucky creatures!
It was my understanding that you should redo it if you bathe the dog. Becuase I didn't think it went into their bloodstreams just to form a film over their skin and it travels via the oils in their coat. By bathing mojo, i stripped him of those oils for a day or two and the film of flea protectant... thus it needs to be reapplied.
I have started too. Fleas pop out with the spring warm up.
I would be careful about re-applying topical treatments. You can over do it. If you use Frontline or Advantage, one bath doesn't dramatically reduce the efficacy of the product.