It's preferred, but the staff is very friendly and may see you right away if needed.
it's better to have an appointment but if you really need to go in and see the vet they'll take you right away if they have an opening in a vet there. for larger animals like horses and stuff the vet will come out to your house usually later in the evening.
It is preferred, but if you call them and explain that you need to come in ASAP they will squeeze you in.
It's preferred
Thanks! Your answer is awaiting moderation.