Bradley is an 89 lb 4 year old previously healthy Boxer. Started using Hartz Once-a-Month Flea & Tick drops UPC 3270098085 two months ago because it was cheaper than Frontline at Walmart. Shortly after the first application Bradley experienced a seizure like episode that appeared that he was in a zombi like trance condition. a few days later his previously beautiful brown coat became discolored with black and bleached out streaks and blotches only on both sides of where the Once-a-Month was applied as per instructions. The loss of hair and discoloration has continued for 2 months. Yesterday I applied the 3rd dose of the third month treatment at 5PM. About 5 hours later he began panting very heavily and drinking large amounts of water even though it was only 55-60 degrees. He stared out in space, again in the zombi like state, with no energy and would almost collapse, fall and stumble at times. He was panting like it was 100 degrees with his tongue hanging out as far as it would go. After providing as much comfort as possible over night he appeared himself the next day, almost. He is still panting more than the temperature would dictate. At this point after reading the information on this site and another, I have scrubbed the Once-a-Month off while also losing 3 big clumps of hair on a short haired boxer. You may have saved Bradley’s life. In any case thanks for making me aware of the danger. I would never have known other wise. My vet has dismissed it as a possible hormone change or allergy. It only happened after application of Once-a-Month.