Dog/Sagittarius and Dog/Aries register a near-perfect 95–100%, the play-becomes-work Canine encounters the stern self-assured Dog/Aries with twinned-souls devotion. Both halves run hot. Both halves are loyal under the motion. The Aries fire and the Sagittarian play sustain each other.
Chemistry is athletic, fast, and devoted. Dog/Sagittarius brings the Frisbee-energy and life-sustaining sense of fun; Dog/Aries brings Ram fire and unwavering commitment. The bedroom is physical and frequent, and outdoors when possible. Both halves treat affection as something you do alongside an adventure.
Conversation is loud and direct. Dog/Aries declares the eternal verities; Dog/Sagittarius riffs and laughs. Both halves listen well in motion. The risk: when something needs sitting still for, neither half is naturally inclined to do it.
Friction lives in command and escape. Dog/Aries plays matchmaker and rides for inconstancy; Dog/Sagittarius climbs out the window when cornered. The cycle becomes the relationship if both halves don't deliberately interrupt it.
Dog/Sagittarius learns from Dog/Aries that staying inside a closing room sometimes finishes the closing thing; Dog/Aries learns from Dog/Sagittarius that play is a kind of devotion, not a distraction from it. Both halves modulate each other into a steadier kind of motion.
At 95–100%, this is a high-energy, deeply loyal pairing. Dog/Sagittarius and Dog/Aries build a fast-moving, joyful life together. Don't bolt at the same time.