Yes, there was an oath. And while he didn't actually know much about hearing aids, it was pretty obvious what they were without actually needing to be told. The magical community didn't have a lot of permanent hearing loss unless magic was involved. Jamie looked up at the question, making sure to face Clint when he said, "Cori." Back to the magic though.
Cori was, by that time, rubbing against his fingertips. She wasn't purring, rarely purred even, but she was clearly content with him. But with the hearing devices fixed, he sat back and watched Clint put them on. Hopefully, his magic would work on devices from another world. It seemed it had anyway. "Doesn't work like that," he laughed, "Dogs can't speak incantations. I might be able to do wordless magic but I've never tried as a dog." He eyed Clint for a moment, "How long until you ask me to turn into a dog?"