The short answer
Put an emergency route on every page. A tap to call link that works with one thumb, your hours, a plain statement of whether you cover out of hours yourself or who covers for you, and a short page of what to do right now written by your own veterinary surgeons.
That is the whole answer. The rest of this post is what each part has to say.
The route, not the page
The word route matters. An owner in trouble is not browsing your site looking for a page called Emergency. They are on whatever page a search or a bookmark dropped them on, and they need the number from there.
So the element is persistent: a bar on every page, fixed at the top or bottom on a phone, carrying the word Emergency and a real telephone link that dials on tap. Not a form. Not an email address. Not something inside a menu.
Then a single page behind it with the detail, kept light enough to load on a bad signal outside a supermarket.
Say what happens at 3am, without ambiguity
This is the part most veterinary websites get wrong, usually by being polite rather than clear.
An owner needs to know exactly what ringing your number at 3am does. Does it reach a vet on site. Does it reach a recorded message giving another number. Does it reach nobody at all until eight.
If another provider covers your nights and weekends, name them, give their number, give their address and say roughly how far away they are. If you cover your own, say so, because it is a genuine reason to register with you and most practices that do it barely mention it.
Professional expectations around emergency cover and around telling clients what the arrangements are exist in most regulated markets, including through the RCVS in the UK and through state veterinary boards and professional guidance in the US. Treat that as orientation rather than legal advice and have your wording checked by whoever handles compliance for your practice.
Your vets write the clinical part
A useful emergency page tells an owner what to do in the next few minutes for the things that come up most: suspected poisoning, road traffic accidents, heatstroke, bloat, seizures, a cat straining to urinate.
None of that should be written by a web team, and none of it should be lifted from another practice's website. Your veterinary surgeons write or approve every line, keep each item to a few sentences, and every item ends with the same instruction to ring. Where a national animal poison line exists, link to it rather than paraphrasing it.
The site's job is structure and findability. The advice is clinical and belongs to clinicians.
Answer the questions that stop people setting off
Two practical worries keep owners at home when they should be in the car.
Cost. Say what an out of hours consultation costs, say how payment works, and say whether you claim from insurers directly or the owner claims back. Put it on the emergency page as well as the fees page.
Logistics. Whether to ring before setting off, which door to use at night, where to park, what to bring, and whether someone will meet them.
Both of those are on the same page as the number, because that is the only page they will read.
Keep booking software out of it
Vetstoria, ezyVet, Provet Cloud and Covetrus handle routine appointments well. An emergency is a phone call. Do not load a booking widget on the emergency page, do not offer an emergency slot online, and do not let a booking flow become the fastest looking route for someone who needs a phone.
Test it the way it is used
Once a quarter, on a real phone, from outside the building: can you dial the right number in one tap from the home page, from a service page and from a blog post. Ring the out of hours number yourself and listen to what a client hears. Check that a cookie banner is not covering the bar. Check the page loads on a weak signal.
Then check your Google Business Profile hours and phone number, because plenty of panicked owners never reach your website at all.
Where this sits
A persistent tap to call route, an honest out of hours statement and guidance written by your own clinical team are standard on a veterinary clinic website as we build it, and the same urgency thinking runs through our other pet business websites. Our packages are on pricing. Make the number reachable in one tap from every page and you have done most of it.