To throw in a note outside bonding (to which I have no experience), I will say, with a bit of sadness, that it’s possible one or both may never be 100% adherent, but you can do your best to achieve that day by day by being actively attentive and taking precautions (i.e. find tempting spots, distract them from it, block off areas, put pee pads certain places, be wary of how you arrange furniture).
I mention this because my lovely Wick has been cleaning an average 2 pees every day. 2 isn’t a lot, but every day is an absolute non-exaggerated frequency. There are days I can go without cleaning it up, but most days no. There’s pride in knowing Wick knows my preference and will go there most of the time, but when he’s head first in cecotropes eating and feels a pee, his wants trump mine, and that’s the dynamic.
I would not default immediately to giving up on 100% — I haven’t, but I would recommend continue to try and do what you can to see what works.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.