My understanding is that ketones produced by this process normally get excreted in the urine, not by being exhaled.
That said, since these are products of the animal's metabolism, I would not consider them pollution if they're just being exhaled into the surrounding air outdoors. If you bring your animal into my climate controlled clean room and have it exhale the compounds there, that would be different--but I doubt the EPA would be the first line of defense in regulating behavior of that sort.
That said, since these are products of the animal's metabolism, I would not consider them pollution if they're just being exhaled into the surrounding air outdoors. If you bring your animal into my climate controlled clean room and have it exhale the compounds there, that would be different--but I doubt the EPA would be the first line of defense in regulating behavior of that sort.