From the Document: "Your pets can be affected by wildfire smoke. If you feel the effects of smoke, they probably do, too! Smoke can irritate your pet's eyes and respiratory tract. Animals with heart or lung disease and older pets are especially at risk from smoke and should be closely watched during all periods of poor air quality"
EPA-452/F-19-002; Environmental Protection Agency- 452/F-19-002
Air Now: https://www.airnow.gov/