I would try another vet and get that cough checked out as soon as possible, glad they are enjoying their new hay.
My boys do not really ever chew on toys but Taco likes rolling and tossing around twig balls with bells in them. They seem to have replaced all of the bells with little wooden balls, I assume for safety reasons, so I get the ones from the cat section and just make sure they have not pulled the ball apart daily. Even when their last one did finally get pulled apart they had no interest in chewing on a bell.
My boys do not really ever chew on toys but Taco likes rolling and tossing around twig balls with bells in them. They seem to have replaced all of the bells with little wooden balls, I assume for safety reasons, so I get the ones from the cat section and just make sure they have not pulled the ball apart daily. Even when their last one did finally get pulled apart they had no interest in chewing on a bell.