While it is true that cows do exhale oxygen but that is applicable on all living beings. ... All animals (and even humans) exhale some amount of oxygen that they breathe.

What do cows breathe out?

Experts have clarified in the past that cows, like any other animal, exhale carbon di-oxide, other gases, and some of the residual oxygen it inhales. In fact, cows emit methane while belching.

Is cow exhale oxygen Wikipedia?

We exhale carbon dioxide and other gases along with the residual oxygen. This process stands same for all living beings, including cow." According to Encyclopaedia Britannica,"Respiratory system is the system in living organisms that takes up oxygen and discharges carbon dioxide in order to satisfy energy requirements.