Do we have the right to make the decision to euthanize a pet or other animal?

We put Dakota to sleep last Saturday. She was 15 or 16 years old, and just becoming miserable. You could see it in her eyes and in every line of her body. She was very sick, though she couldn’t tell us where she hurt.

We let Dutchess go back in March of last year. She had throat cancer and was starting to slowly choke to death.

Did we have amoral obligation to help these animals out of their misery, or should we have allowed them to live (and suffer,) since they can’t give consent to euthanasia?