Keto-breath is a transitional thing that goes along with carb flu. Once you get more adept at burning the ketones it goes away. I haven't had it since the first time I went low carb.
I love zoos. The big black panther was flaked out in the shade when we came up. She evidently smelled dog and looked up but then let her head fall back to the ground like, "I could have you for a snack but it's just too hot. I can't be bothered."