- Make them a BOB that meets their needs. Include in their bag food, water, a blanket, any needed medication, a toy, etc. You can skip the clothes...nothing makes me more incredulous than to see a poodle dressed up like a Barbie doll when many children in our world have one set of threadbare clothing to wear.
- Have a way to transport them. A carrier is a good idea. I wish I would have got a photo of a guy who got on the city bus a few days ago carrying a small cage with a very large snake in it. Nobody said anything but I'm sure that would have cleared the entire bus in a couple of countries I've been to. It's important to have the items needed to contain and transport your animal on hand (ie: a small fish tank if your fish usually reside in a 100 gallon aquarium; a leash and muzzle for your dog, a halter for your horse, etc).
- Have an evacuation plan. How will you be able to evacuate with your pet? Of course you can take a dog in your car but what will you do with your pot bellied pig, horse, or llama? Once you evacuate, where will you be able to stay? Do you have friends who can board your horse temporarily? Does the hotel you are going to allow pets? Have you checked with your county disaster planners to see if they have a plan for evacuees with pets?
Those are just the basics. I came across an animal preparedness web page from the AVMA which elaborates on these and many other things to consider when prepping with pets or large animals. Check it out here.