If she's still "happy being a dog", (meaning not in pain), you could probably leave her alone.

If she's urinating blood, that sounds like she has kidney problems. Did they take her to the vet to see if they could get that treated? Kidney problems can be painful.

I've never been actually involved in putting any of our dogs down. I was too young for the first dog that we had, and didn't feel that it was my decision for our second dog.

My last dog, TinyMonsters, when he died, everything was out of my hands. It happened so quickly and somewhat subtly, and we didn't realize what was going on right away (he was poisoned by a neighbor). One day he was fine, the next day he was a lot clingy. The third day we realized he was really sick, took him to the vet, and the vet tried to save him. But Tiny still died. There really wasn't any talk of putting him down. We wanted to save him, thought we could. Didn't realize until after he died that he might have been poisoned. (the vet checked for all the usual suspected poisons. Didn't find any. He thought that Tiny was poisoned tho)

If Tiny had needed to be put down, that probably would have been my decision. He was our family pet, but he really was my dog. (I raised, trained, and was his major caregiver and "alpha dog" to him.) I don't know if I could have done that for him. Kind of glad that I didn't have to.