Any chance the loss of weight is more towards the rear end of his body? Have you noticed more “labored” breathing from him as he has gotten older?

If so, read up on “laryngeal paralysis”. I am certainly not a vet but I have told many older lab owners about it after mine was diagnosed. It was eye opening because at least in my experience it seems to be often overlooked. My 14 year old lab had this condition which ended up taking him. I believe if you catch it early enough your vet can do a corrective tie back procedure.

I am sure Glenn or your local vet can offer more if this is the case.


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