I think it’s just that having a four legged friend provides some companionship. (Not that the idea of soulmates is at all useful anyway)

I don’t think so?

I think it’s alluding to people having different needs, with this dog playing one small part of their complete picture.

Maybe the other shapes are filled by friends to come, a beloved family member, more dogs, a lot more dogs, oh geez that’s so many dogs.

50/50