When I was very young I remember seeing a dog who had wheels instead of rear legs, and I cried because I felt bad for the dog. But that was misguided.
The amazing thing about animals is that they don't feel bad for themselves or need our pitty -- they take it in stride and just get on with enjoying life.
This warmed my heart:
Although.. come on lady, sticks are free, it wouldn't hurt for you to have more than one.