I have a 2 year old black lab that I took to kennel while my family went on vacation. I picked him up from the kennel last Saturday and his voice was horse and his left lymph node was swollen. I get the voice part, as he was probably barking a lot. Fast forward to today and his voice is slowly coming back but his lymph nodes (node) have been swollen (like ping pong ball size). I gave him Benadryl earlier last week a couple times and it seemed to help but the lymph node is swollen again this morning. He doesn't seem like it is bothering him at all, energy wise and his appetite is normal as is his bathroom visits. Is this something to be alarmed about?
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