The safest flea and tick collar for dogs is designed to protect pets from parasites like fleas and ticks while minimizing potential health risks. These collars work by releasing active ingredients that repel and kill fleas and ticks over time, typically several months. The safest options are made with non-toxic, vet-approved materials that are gentle on the dog's skin and overall health. When selecting a flea and tick collar, it’s important to consider factors like the dog's size, age, and any sensitivities to ensure the collar provides effective protection without causing harm.