YOU SAID:

a dog sat on a log with a frog dressed as a dog

INTO JAPANESE

犬は犬のように服を着たカエルでログに座っていた

BACK INTO ENGLISH

The dog was sitting in the log with a frog wearing clothes like a dog

INTO JAPANESE

犬は犬のような服を着たカエルでログに座っていた

BACK INTO ENGLISH

The dog was sitting in the log with a frog wearing clothes like a dog