No, you should not use cat flea treatments on puppies. Cat flea medications often contain ingredients that are toxic to dogs. For example, permethrin, which is commonly found in cat flea treatments, can be extremely harmful to dogs and can cause symptoms such as tremors, seizures, and even death. It's important to use flea treatments specifically formulated for dogs, as they are designed to be safe and effective for canine use. If your puppy has a flea problem, consult your veterinarian for the best flea treatment options that are safe for their age and size.

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Topics covered in this question:

Dog Health Pet Care Puppies Flea Treatment Toxic Substances