Keeping in mind that April is National First Aid Month we'd like to remind you that it's important to not only have a first aid kit for your dog at your house, but to remember to bring it along when you and your dog go off on adventures.
What kinds of things should you bring along?
I never enter the woods with my dogs without making sure that I have a couple of dog booties, some gauze, tape, antibiotic ointment, and an extra long-sleeve shirt. This is a pretty makeshift first aid kit including only the bare minimum but it comes in handy when your dog ends up with a torn pad on their paw, a cut running up their leg or across their chest, or for some, even if your dog comes back limping.
I carry dog booties for small foot injuries. If it's small enough that I'm not worried about it I will cover it with a dog booty for the time being. If it's a little larger I will use some gauze and tape and wrap it before using the dog booty. I will use antibiotic ointment on all open wounds until I'm able to get home and wash it out. And the long sleeve shirt you ask? I could use it in a few different instances. If my dog cuts open his chest or belly I could use the shirt to wrap it and put pressure on it. If I had a small dog who started limping on a hike I could use the long sleeve shirt as a make-shift sling (even a 20 pound dog would get heavy if you have to carry them a mile or more).
Check out this website for more first aid kit ideas: http://www.humanesociety.org/animals/resources/tips/pet_first_aid_kit.html
If you don't want to carry your dog's first aid kit try getting them a back pack! Some dogs are more than happy to carry their own supplies, and maybe even some of yours as well!