you need something dog related and there it is... right in the trunk of your car.
Anyway, I bought a new bike the other day (does the happy dance). So I decided to try it out early.... well I ended up being longer than I planned... and I didn't have time to take Muffin home before leaving. I should also mention that I don't keep a collar on the woods... I'm paranoid that he'll get stuck on a branch or root or something. I do always bring a leash with me, just in case, but it's almost always a slip lead of some kind(so no collar needed).
Anyway, I had agility class last night..... and he had no collar.... but not to worry, I had an extra harness in the back of my car!
Yes, I carry treats, bowls, water, leashes, beds, collars, doggy first-aid stuff, and even cheap slip leads I can give away if I come across someone who has "forgotten" theirs.