YOU SAID:

i need a vacuum to comb the hair out of my dog

INTO JAPANESE

犬の毛をとかすために掃除機が必要です

BACK INTO ENGLISH

I need a vacuum cleaner to comb my dog's hair

INTO JAPANESE

犬の毛をとかすのに掃除機が必要です

BACK INTO ENGLISH

I need a vacuum cleaner to comb my dog's hair