The word "unfixed" means something that is not set or determined. It can refer to something that is not secured or fastened in place, or something that is not resolved or decided. It implies a lack of permanence or stability. Full definition
This year, we wanted to share with you some of the heartwarming photos that keep us going in the face of cold trapping weather and the cold - hearted abandonment of unfixed cats, adding to the overpopulation cycle. (communityconcernforcats.org)
The day to day business of talking to owners and caretakesr of unfixed cats, scheduling vet appointments, trapping ferals, getting cats to and from vets, keeping records.... (berkshireanimaldreams.org)
Both can remain unfixed for a long period of time and are suggestive, additive modes of working. (brooklynrail.org)