yard treatment

I was going to order and make a combination spray Permethrin and Precor for flea control. I was going to use this for inside the house but I wanted to know if this mixture will also be effective/safe for the yard. Thanks.

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I’ve got a bird feeder in my yard which attracts alot of birds. Unfortunately, it also attracts alot of the neighborhood cats. I don’t have any pets but I’ve got FLEAS!!! How can I safely treat my yard to control these menacing fleas and not hurt all the birds I enjoy???? I don’t really care about the cats but I LOVE my birds!

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