A: Yes, the cap can be unscrewed from the bottle. We don't recommend unscrewing the cap though due to storage purposes.
A: Not really recommended for dogs because the high alcohol content dries their ear canals so much. But does depend on the situation. There are so many ear drops and cleaners on the market for pets (dogs especially), if this was indicated to be used by vet, then lubricating their ears with something that has oil or moisturizer (esp made for pets ears) after would be necessary. This is mostly alcohol and will cause a ‘warm’ sensation that will irritate pet.