Finally tick freedom without chemicals

We wanted it just did not believe it but it helps. For several weeks, we do field test with 3 dogs of different coat length. No or significantly reduced tick infestation. Our 2 1/2 year old PON, chain length 44 cm, no tick since the creation of the Amber collar about 5 weeks ago, both in Berlin-Grunewald and in Upper Franconia (our dog every day is free-running in field, forest, corridor, thus ticks constantly exposed) We had previously Chemistry (Expot), but the amber necklace is at least as effective.