You say you need to look for the spots with black light. Does that mean they're very small puddles in lost of places? How do you know it's her and not one of the other cats? I'm thinking maybe some cat (possibly Aramis but could be another cat) is suffering from some sort of UTI.
Because she goes right outside the box, I'm thinking maybe she feels trapped inside the box. This is very common with hooded boxes but can also happen with regular boxes that are placed in a corner. Perhaps you can try moving the box she goes next to just a little bit. No drastic change, just to make sure that it doesn't feel cornered. She may like the sense of security that a covered box provides, but she needs to feel that she has an open escape route out of the box. This is especially important if the other cats hang around when she goes.
How did she do when you tried confinement? Did it make her use the box while confined? How about right after?
Also, never try to put her in the litter box. Cats don't like that and if she does have a sense of being trapped there it will only increase her fear of the box.
Because she goes right outside the box, I'm thinking maybe she feels trapped inside the box. This is very common with hooded boxes but can also happen with regular boxes that are placed in a corner. Perhaps you can try moving the box she goes next to just a little bit. No drastic change, just to make sure that it doesn't feel cornered. She may like the sense of security that a covered box provides, but she needs to feel that she has an open escape route out of the box. This is especially important if the other cats hang around when she goes.
How did she do when you tried confinement? Did it make her use the box while confined? How about right after?
Also, never try to put her in the litter box. Cats don't like that and if she does have a sense of being trapped there it will only increase her fear of the box.
