When Should I Start Flea and Tick Treatment for Dogs?
You should start flea and tick treatment as soon as your puppy is old enough for a vet-approved product — usually from 8 weeks old, depending on the brand. Most dogs need protection all year round, not just in summer. Starting early and staying consistent is the best way to prevent infestations.
At Smith’s Pets, we always recommend prevention rather than waiting until there’s a problem.
When Should Puppies Start Flea Treatment?
Most puppies can begin flea treatment at 8 weeks old, but always:
Check the product label carefully
Confirm the minimum weight requirement
Speak to your vet if unsure
Never use a treatment designed for larger or adult dogs on a small puppy. Dosage is based on weight and age.
If you’re unsure which product is suitable, we’re happy to talk through safe options in store
Do Dogs Need Flea and Tick Treatment All Year Round?
Yes — in the UK, fleas can survive indoors throughout the year. Ticks are most active in spring and autumn, but mild winters mean they’re increasingly a year-round risk.
According to the RSPCA, regular preventative treatment is essential because fleas can quickly infest your home. The PDSA also advises routine protection to prevent discomfort and disease.
Even indoor dogs can get fleas brought in on:
Shoes and clothing
Other pets
Visitors
Wildlife in the garden
How Often Should I Treat My Dog?
This depends on the product type:
Spot-on treatments – usually monthly
Tablets – monthly or every 3 months
Flea collars – can last up to 8 months
Set a reminder on your phone so you don’t miss a dose. Consistency is key
Should I Only Treat in Spring and Summer?
No. While fleas and ticks are more visible in warmer months, heated homes allow fleas to thrive year-round.
We recommend:
Treating every month, all year
Treating all pets in the household
Washing bedding regularly
Vacuuming frequently during peak seasons
Stopping treatment in winter often leads to surprise infestations in early spring.
What About Tick Treatment — Is It Different?
Many modern flea treatments also protect against ticks, but not all do. Always check the packaging.
Ticks are commonly found in:
Woodland
Long grass
Moorland
Areas with deer or livestock
If you walk your dog in these areas, tick protection is especially important
What Happens If I Don’t Start Treatment Early?
Without preventative treatment:
Fleas can lay hundreds of eggs in your home
Dogs may develop skin irritation or allergies
Heavy infestations can cause anaemia in puppies
Ticks can transmit serious diseases
Once fleas are established in carpets and soft furnishings, they’re much harder to remove. Prevention is far easier than treatment.
When Should I Contact a Vet?
Speak to your vet if your dog:
Has severe itching or hair loss
Develops red, inflamed, or infected skin
Seems lethargic after a tick bite
Is under 8 weeks old and has fleas
Has a known skin allergy
Your vet can prescribe stronger treatments if needed and check for complications.
Can I use cat flea treatment on my dog?
No. Some cat products are toxic to dogs and vice versa. Always use a product specifically licensed for dogs
My dog doesn’t have fleas — do I still need treatment?
Yes. Preventative treatment stops infestations before they start. Waiting until you see fleas means they’re already established
How do I know if a product is working?
You may still see a few fleas shortly after treatment, as they must bite to be exposed to the active ingredient. Regular monthly use prevents ongoing infestations
If you’re unsure which flea and tick protection is right for your dog, pop into Smith’s Pets and we’ll help you choose a safe, effective option based on your dog’s age, size and lifestyle
Visit us in-store or send us a message, we're always happy to help!
