Flea prevention for French Bulldogs in flats

City flats are actually one of the higher-risk environments for fleas — communal hallways, lifts, and neighbouring pets all create constant exposure even if your dog rarely leaves the building. The most effective prevention depends on your dog's size and weight, your local tick risk, and whether you want a spot-on, collar, or oral treatment — and some widely sold products are significantly less effective than others. A few quick questions: how much does your Frenchie weigh, are you seeing any flea signs at the moment, and do you have a preference for how you apply the treatment?

10kg is useful to know — French Bulldogs can vary quite a bit. Given you're in a low-tick urban environment and the priority is flea prevention, a spot-on is the right call here. They're quick to apply, effective within 24 hours, and don't rely on your dog chewing a tablet. One thing worth knowing: some popular supermarket spot-ons use permethrin or weak pyrethroid compounds that fleas in urban areas have increasingly developed resistance to. You want something with imidacloprid or fipronil as the active ingredient.

For a 10kg city Frenchie focused on flea prevention, I'd go with Advantage spot-on by Bayer — specifically the medium dog version (4–10kg). The active ingredient is imidacloprid, which kills fleas on contact rather than requiring them to bite, so it's good for dogs with any skin sensitivity, which Frenchies can be prone to. It starts working within an hour, lasts four weeks, and is one of the most consistently effective spot-ons for the flea strains common in UK urban areas. Apply it to the back of the neck where she can't lick it, part the fur so it reaches the skin, and repeat monthly. It doesn't cover ticks meaningfully, but that's fine given your situation.

Both, ideally. Around 95% of a flea infestation lives in the environment — carpets, soft furnishings, skirting boards — not on the dog. If your Frenchie ever brings a few fleas in, they'll lay eggs in your flat within 24 hours. The Advantage treatment on the dog handles what's on her, but I'd also recommend a household flea spray like Indorex once every 12 months. It contains an insect growth regulator that stops flea eggs and larvae developing, which breaks the cycle. One can treats an average flat. Do it on a day you can ventilate properly, keep her out for a couple of hours, and you're covered.

Good plan. Monthly Advantage on the dog, one Indorex spray on the flat annually — that combination is about as solid as urban flea prevention gets. Set a monthly reminder for the spot-on because it's easy to let it slip. If you ever start visiting parks or the countryside with her and tick exposure increases, it's worth revisiting and looking at something like NexGard or Bravecto, but for central London life you won't need it.