flea spray

I have a 7 week old Shih-tzu puppy and everything we can find for treatment says “not to use on puppies under 12 weeks”. What can I use on her that won’t hurt her?

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I’ve got a dog that’s been fighting fleas this whole winter. Now his skin is sore and my house is still infested. I’ve had a pest control company spray over and and over but it’s not helping. I’m afraid to spray anymore but I’ve got to do something. Help!!

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