Q. My dog just vomited and is now acting lethargic and her head is shaking and she has drool coming from her mouth which is not normal for her.
A. Has she had access to anything toxic? She may have swallowed a stinging insect. If her breathing is affected call the emergency vet immediately or if she has had access to anything toxic then also contact the emergency vet.
Otherwise, dogs that have vomitted or are feeling sick do drool and maybe a bit lethargic if they are feeling under the weather. If it continues then consult a vet