Omg I want to know too
Actually one I can think of off the top of my head is I love Amy hmm but the golden retriever gf is also a yandere lol so not sure if it would fit the description that well c:
The one I can think of is Perfect Buddy (BL) office workers / black cat x golden retriever. Really good ongoing story, spicy, and the drama is on right now!
try Netkama Punch!!!
Not bl or gl but the broken ring definitely fits the golden retriever x black cat dynamics.
anyone knows more manhwa like this? i dont mind if its bl/gl straight just gimme a black cat x golden retriever duo TT