Wow, what a tough call. I think I would have to say, since she is spayed, let her live out her days as a semi-wild outdoor kitty. I would rather see that in her case, than to end her life! Some cats just are not suited for the tame / indoor life ....... but I believe it is God's intention for them to LIVE their lives! Just my opinion, I will support your decision.....and THANKS for all you have already done for Patches!!!!!