The description here sez "you won't find tiger in dog's route" but thats totally completely false as i find dog in tigers route as well as tiger in dogs route.
Viewing post in Just Friends - Visual Novel comments
What I meant with that is that you won't interact with the Dog and the Tiger at the same time, and you will know which route you are because in the brief moments you can see them on someone else's route it's for about five or six dialogues before they ran away to where they want to go. That being said, you're right, I should phrase things better, gonna update the post just to be sure I explain that bit a little better.