Cheap monthly flea prevention for dogs

Keeping flea prevention affordable is totally doable — but it's worth knowing that a lot of budget products on supermarket shelves barely work, so you want to spend your money on something that actually does the job. The most effective option depends on your dog's weight, whether ticks are a concern where you live, and whether you're happy using a monthly spot-on. What size is your dog roughly, and are you mainly dealing with fleas or ticks too?

Perfect, that makes this straightforward. At 12kg she falls into the medium dog range, which is well catered for. Since ticks aren't a major concern, you don't need to pay extra for a combined flea and tick product. Can I ask — have you used anything on her before, and did it seem to work?

That tracks — a lot of those cheaper own-brand spot-ons use permethrin or weaker actives that have very patchy efficacy these days because fleas have built up resistance. What you want is fipronil with S-methoprene, which kills adult fleas and also stops eggs and larvae developing. My recommendation for your situation is Frontline Plus for medium dogs — it's a monthly spot-on, widely available on Amazon UK, and a six-pack typically comes to around £25–30, which works out to about £4–5 a month. It's a proven active ingredient combination and a significant step up from what you've been using.

Very easy — you part the fur between the shoulder blades and squeeze the pipette directly onto the skin, takes about 30 seconds. It starts killing fleas within 24 hours and reaches full effectiveness within 48 hours. One thing worth knowing: if she already has fleas in your home — in carpets or bedding — the spot-on alone won't clear those. You'd want to vacuum thoroughly and use a household flea spray like Indorex on soft furnishings once to break the cycle. After that, monthly Frontline Plus should keep her clear.