When can I stop giving worming and flea meds to dog?

[sunshinechaser]

Apologies if this has been asked before! But I'm looking for some advice. I will ask our vet however thought I'd ask here first.
My dog is 9 and since she was a pup we have given her a monthly worming tablet (Milbemax) and a 3 monthly flea treatment (Bravecto). We have her on a monthly plan at the vet which is £25/month and covers the cost of these tablets and annual vaccinations.
Do we need to continue these meds for life? She is on dry kibble only which I think reduces the risk of worms. She is also never really around other dogs unless we meet them on a walk and certainly never gets near a cat! Again I think this reduces the risk of fleas.
I'm asking as my DM has never given her dogs flea or worm treatments (couldn't afford it) and her dogs have always lived to a ripe old age. Thanks

Because Vets would want to guarantee the treatment will be effective and least likely to be harmful to pet along with making sure it's administered correctly and try reduce future resistance issues.
My vet said those with fipronil (frontline, bob Martin) aren't very effective these days due to over use fleas have built up resistance. While vet can't recommend an OTC they said some clients had found Advantage ok which did the trick although I'd only spotted 1-2 flea after checking all dogs so it wasn't at infestation stage and I also treated the house with indorex spray, vacuumed/washed etc. Many people treat the animals so the feeding fleas die but forget fleas spend most of their lifecycle in the environment so that also needs treating before the next batch hatch.

Ticks can carry diseases that cause long term health issues to pets & people and some areas are high risk so have to bear that in mind but both tend to be active in warmer months. Without a cold winter to help kill some off can end up with a population boom in fleas & ticks so some years can be much worse than others.

Worms silently cause health issues over time, may not seen in poo and has potential to be passed onto people so it's a good idea to either treat or at least test poop to check if treatments are needed. Sure with horses they used to rotate type of wormers to help reduce risk of drug resistance.