I just got my lawn mower repaired for that same reason.Well, I broke the lawn mover. It won't turn left. I have a feeling it is something simple ... it was working just fine and then WHAM it wouldn't turn left. Turns right just fine, goes straight and back. The wheels just won't turn left. Glad I was finished with mowing for the day.
Sorry to hear about the gosling. So many things can go wrong when they are babies.
Mine is a Husqvarna. it has two cables. one for turning left one for right ..
what kind do you have ?
remember, U Tube is your friend.. You can look up just about anything on there.