earlier in the summer of 2011, my husband and I treated our gorgeous 6 month old black tri working Australian Shepherd with one dose of hartz flea dip. within a week her chewing and scratching was off the charts, she had huge fleas, and her fur was falling out by the handfuls. just touching her to pet her would make her fur snap and break off, and her first bath after that had my husband and I in tears over that fact her beautiful 4-5 inch long gorgeous fur was just gone from her rear, her legs and her back… This proceeded to turn into hundreds of dollars worth of frontline, vet visits, various styles of E-collars, nutritional supplements to target the skin problems, and a drastic change in lifestyle and activities not doing as much outside and avoiding giving her baths unless needed as her skin was so bad. we’ve been fighting her to get her fur back ever since, and only with daily doses of fresh salmon oil, protein mix, vitamins, And Taste of the wild dog food had she started to slowly recover… and then. she got fleas. again. my husband brought them home from work. she immediately started attacking her skin again and by morning time had destroyed any and all fur that had tried to come back. I contacted my vet again since i could not use any further flea dip products on her due to her skin being inflamed. (She had never ever had any problems before hartz, never chewed, and had no allergies.) my vet gave me comfortis flea pills to try. WITHING 30 MINUTES her scratching and unbearable chewing had stopped and withing 6 hours there were no signs of fleas on her at all. I have never seen anything like it and in the past two weeks her fur has started to come back, her skin is clear, and she is not chewing or scratching. I am in love with this product and I HIGHLY recommend it to any fellow sufferers who still are fighting fleas with their dogs not recovering from the hartz. Its a long road but i believe we’re finally on the way to recovery. I sympathize with those owners of beloved pets who were killed by this product and I hope those still recovering will start to see a road of hope like I have.