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Hi, I'm Dr. Peter. Welcome to JustAnswer. I'm reviewing your question now and will post back with your reply ASAP.
Friend, you are right, it sounds like he does have laryngitis. Typically, their voice will get better within 1 week. Normally, I would recommend to wait it out. But, if you are seeing that he is having difficulty swallowing it is best to not wait and have him checked by your vet in the morning.
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