Dr. Brown

Dr.Tail Vet

It sounds like your Parson Russell Terrier is experiencing some concerning symptoms. Lethargy, heavy panting, refusal to eat, and vomiting can be indicative of several serious conditions, including infections, gastrointestinal issues, or even poisoning.

While it's reassuring that he is still drinking water and staying hydrated, the combination of symptoms you're describing is worrisome. Vomiting once might be due to something minor, but when it is paired with lethargy and heavy panting, it could signal a more serious underlying issue.

Here are a few things you can do at home while you monitor his condition:

Firstly, ensure he has a quiet, comfortable place to rest away from any stressors. This will help him feel more at ease. Continue to offer water and check for signs of dehydration, such as dry gums or skin that doesn't quickly return to place when pinched. Additionally, keep an eye out for any other symptoms like diarrhea, changes in gum color, or unusual behavior.

However, given the severity of his symptoms, especially the lethargy and heavy panting, I strongly recommend seeking immediate veterinary care. These symptoms can indicate a serious condition that requires prompt medical attention. The vet can perform necessary diagnostics to determine the cause and provide appropriate treatment.

If you have any further questions, please feel free to ask. Thank you.