Two Dog/Libra in one room registers 95–100%, and immediately notices that one of the picture frames is slightly crooked. The DoubleSign zodiac's most observant faultfinder Canine has met its mirror. The apartment will be impeccable. The standards will be high. The mercy will need to be deliberate.
Chemistry is graceful and quietly devoted. Both Dog/Libra halves bring the quieter brand of affection and the canon-flagged sock-mismatch sensitivity. The bedroom is unhurried and aesthetically considered. Both halves treat physical intimacy as a privilege earned through right behavior.
Conversation between two Dog/Libra is precise, polite, and constantly evaluating. Both halves notice the missing detail. Both halves are too well-mannered to mention it most of the time, which means small wounds accumulate as silent grades.
Friction lives in shared faultfinding. Two Libran critical eyes, applied to the same household, produces a relationship where everything is graded and nothing is forgiven quickly. Both halves take the canon's exact warning, find the strand of hay in the haystack, too literally.
What each Dog/Libra needs from the other is the canon's own prescription: extend universal justice to include those closest to you, leavened with good old-fashioned mercy. With two of you, mercy has to be a shared practice, not just a quoted ideal.
At 95–100%, this is a deeply compatible, slightly demanding pairing. Two Dog/Libra build a beautiful, well-evaluated life. Practice mercy on purpose. Repeatedly.