Get Your Dog Care Questions Answered by Experts
I am sorry to hear you are worried about Treo. I am a veterinarian and will do my best to help.
If his gums are more pale than normal, that is a concern. It can be a sign of many things: low red blood cell count (from internal bleeding, or autoimmune disease), internal disease (liver, kidney, pancreas disease), pain, allergic reaction, exposure to rat poison.
Is he eating and drinking?
Can you take his rectal temperature? Normal is between 101 and 102.