What is the safest way to get rid of fleas and ticks?


I think I have fleas and ticks in my backyard my dogs got fleas so I got up free pass for her but how do I get rid of them from the couch carpets in backyard that's why I think it stemmed from because they pulled a tree put a new fence in my town house and stirred up a lot of the dirt plus I got bad ants big time Big ants and I can't get rid of them even with poison I'm trying to get rid of these things safely so it doesn't harm my animals any ideas any can anybody help me with ideas thank you

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