Open-mouth breathing, oxygen cage, cat
A cat with open-mouth breathing receiving oxygen in an oxygen cage. Note the environmental monitors of oxygen (78.2%), CO2 (1,101 ppm), temperature (22.3°C), and humidity. CO2, measured in parts per million (ppm), should be lowered by ventilating the unit or using a unit with CO2 scavenging or improved cage ventilation when levels are > 2,500 ppm.
Courtesy of Dr. Andrew Linklater.