Took in a cat that has never been dewormed?

I’m not sure about doing it myself. She’s had all of her shoots but her previous owners were older and never dewormed her. I think she’s around 14 or 15. Should I jut not do it at this point or do it myself? I’ve got a vet app. for in two weeks. I had wanted to do it before then but didn’t know if that is a bad... show more I’m not sure about doing it myself. She’s had all of her shoots but her previous owners were older and never dewormed her. I think she’s around 14 or 15. Should I jut not do it at this point or do it myself? I’ve got a vet app. for in two weeks. I had wanted to do it before then but didn’t know if that is a bad idea. Never been in this situation before.

I use Revolution on my other cats.

Thanks.
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