Hi, I can help you with your question today.
The signs you are seeing fairly non-specific.
However, I'm concerned because he definitely sounds painful.
I don't know if the pain is in relation to joint problems or perhaps a GI upset.
From what you describe though, I really do recommend having him evaluated by a local vet as soon as possible.
I would start with a physical exam, then possibly blood work or x-ray of any regions that appear to be painful on palpation.
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