Further updates from Judy:
Dora has been spayed now. The vet decided to do it since she was knocked out with the dart. Good call.
Tuff has started eating, which is a good sign. Yesterday, he looked so pale, Imm thought he wouldn’t even survive. We hope he pulls through. Rescued in the nick of time!
Phantom turned out to be a cryptorchid (only one visible testicle, the other being undescended). So far, he does not present with TVT, which is good.
Cryptorchidism: https://vcahospitals.com/know-your-pet/retained-testicle-cryptorchidism-in-dogs
We have encountered such dogs before and our vets always recommend surgery to remove the undescended testicle(s).