The owner has also noticed that Olivia seems less active during the last three months. Olivia had always been a rambunctious dog, but she now sometimes acts dopey, according to the owner. She explains that Olivia intermittently seems sleepy and uninterested in playing or moving much. These periods only last a short while, and the owner has not seen loss of consciousness or seizure-like activity. Olivia’s appetite is normal, and she has not exhibited vomiting or diarrhea.
Olivia also lives with a 5-year-old beagle that appears to be in good health. Olivia receives a monthly flea, tick, and heartworm preventive and no other medications. She has had no environmental changes, known toxin exposure, or recent travel. In the last month the owner changed both dogs’ diet from a premium commercial brand adult dog food to a grocery store brand.
Physical examination findings