person A: My dog had bone cancer and we had to put her down. It was a very sad_comma_ but necessary decision. 
person B: it takes a strong and compassionate person to make that kind of decision.
person A: It was very hard_comma_ but she was suffering. Our vet was very helpful and we did ask him if he thought it was too soon. He assured us that it was not. 
person B: She had a happy life. I'm sure she understands.