1.I only recently learned from my last AKC class that they do not recommend the snap collar because if your dog were to get scared (or whatever) and run this could open and you could have a collar with no dog at the other end. I use these collars at home now beacause I'm worried of my dogs getting hung up in our grove or caught on something else but I do put on a regular collar when away from home now. I never thought of this but it makes sense!
2. If you have old collars or leashes you don't use anymore...donate them to a humane society or rescue! I tend to buy more than I need or they fade or I just don't use a collar so I have a co-worker who works for the humane society that I give mine to and they are more than happy to recycle/reuse what I no longer want and they many times don't have enough so this helps them out also! I'm sure you could just drop them off...it's a small thing but I feel that I've helped!