YOU SAID:
My dog is about to go have a walk
INTO JAPANESE
私の犬は散歩に行くところだ
BACK INTO ENGLISH
My dog is going for a walk.
INTO JAPANESE
私の犬は散歩に行きます。
BACK INTO ENGLISH
My dog goes for a walk.
INTO JAPANESE
私の犬は散歩に行きます。
it is unlikely that this phrase will ever reach equilibrium