Flea treatment for Shih Tzu long coats

A Shih Tzu with a floor-length coat is one of the trickier flea situations — that dense, long fur is brilliant at catching fleas on walks and hiding them once they're on board, which means a light infestation can escalate quickly before you even notice. The other thing worth knowing upfront: treating your dog is only half the battle. Around 95% of fleas aren't on the dog at all — they're in your carpets, soft furnishings, and floor cracks as eggs and larvae. So a single product won't cover everything. To point you to the right treatment, a couple of quick questions: is her coat currently kept at full length or clipped shorter, and when you comb through the fur near the base of the tail or belly, are you finding live fleas or just flea dirt — and roughly how many?

That's a moderate infestation caught at a useful stage — you're not overwhelmed yet, but flea dirt consistently showing up means eggs are almost certainly already dropping into your carpets and her bedding. You'll want to address the home at the same time as treating her, otherwise you'll just be re-infesting her on every walk. Now, for a show Shih Tzu at full coat, spot-on treatments are the most practical — you're not bathing frequently enough for a wash to be your primary defence, and a collar can create uneven contact through that volume of hair. One important thing: is she on any current flea prevention, or has she had anything in the last eight weeks?

That's really helpful — Advocate is actually a solid choice for her situation, so getting back on it makes sense. But given she has an active infestation right now, I'd start with a one-off fast-acting treatment to clear the live fleas on her immediately, then restart Advocate as your monthly prevention going forward. For that immediate knockdown, Frontline Tri-Act Spot-On for dogs is the one I'd go with here. It kills fleas on contact without them needing to bite — which matters a lot with a long coat, because fleas can shelter deep in the fur before a bite-activated product even reaches them. Apply it to the skin at the back of the neck as usual, part the coat carefully to get good contact. Then restart her Advocate roughly two to three weeks later and keep it monthly. For the house, Indorex Defence Household Flea Spray covers the environment — one can treats up to 90 square metres and keeps working for a year. Vacuum thoroughly before you spray, wash her bedding on a hot wash, and you'll be in good shape within a couple of weeks.

Yes, it's licensed for use in dogs from 2kg upwards, and a Shih Tzu will comfortably sit in the correct weight band — just double-check the pack when you buy, as Frontline Tri-Act comes in different doses by weight. The sensitivity concerns you're probably thinking of are more associated with certain herding breeds like Collies, which can have a genetic mutation affecting how they process some antiparasitic drugs. Shih Tzus don't carry that mutation. Apply it when her coat is dry, don't bathe her for 48 hours either side, and keep children away from the application site until it's dried. She should be fine.

Yes, definitely — give her a good thorough comb-through beforehand, particularly around the belly, groin, and base of the tail where fleas congregate. It removes as many live fleas as possible before treatment and helps you part the coat cleanly to apply the spot-on directly to the skin. Dip the comb in hot soapy water between strokes to drown any fleas you pick up. Then apply the Frontline Tri-Act, treat the house the same day if you can, and you should start seeing a real difference within 24 to 48 hours. Keep up the monthly Advocate after that and the problem won't come back.