Which method is the best for dogs to repel insects in vitro?

I dare not say which form is good. There are many ways to drive away insects. At present, mainstream drops or tablets are very good choices. However, I have recently discovered a new posture of insect repellent, which is Soledad's insect repellent collar. Compared with traditional deworming methods, Soledad collar can provide a guard time of up to eight months, and it is also simple and convenient to use. Thanks to Soledad's patented polymer matrix slow release technology, Soledad collar can be used for eight months, and it is also waterproof and tasteless. Soledad, as a mosquito repellent product, can target fleas, ticks and lice outside dogs, which are very common parasites and do great harm to dogs. The most important thing is that Soledad can repel ticks, thus preventing ticks from sucking blood and reducing the spread of insect-borne diseases.