Flea Control Product Poisoning | PetMD
http://www.petmd.com/cat/emergency/poisoning-toxicity/e_ct_flea_control_product_poisoning
The most important way to prevent overdose is to read the label and follow the directions: how much, how often, and how to apply it on the cat. If you cannot find this information on the label, do not use the product. Make sure the product is labeled for cats; you can NOT substitute with dog products.
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