my cat myrtle had a few fleas, so i decided to buy the sergents natual remedy medication to put on her. i followed directions putting it between her shoulder blades like it said. about 15 mins. later, she started vomiting. i quickly washed off the flea med. and she seemed ok. a few days later i noticed her hair was missing where i applied the med. and it was all dry and flakey. i thought this medicine was safe but i was wrong. i’ll NEVER buy another product from this company again. i’m just so thankful that all she lost was some hair, and not her life.