My dog wore the flea collar for about 4 weeks. Bec...

My dog wore the flea collar for about 4 weeks. Because of the itchy inflammation of the skin (redness, swelling, flakes, bumps) I took the tire off. Within two weeks my dog developed eczema and needs to be treated at the vet. Beaphar Canishield is cheap but the Vet treatment is tens of euros more expensive.

Active Substance Beaphar Canishield:
Deltamethrin (0.77g) Deltamethrin (0.77g)
And my dog is apparently sensitive to the active ingredients. Not recommended.