Back to the original question though--If the other person were a friend or close relative, I might go ahead and notice out loud that the animal needed a nail trim or coat maintenance and then go ahead and just perform it. I don't know most of my neighbors well enough to barge in and offer to trim their dogs' nails.

It's sort of the same thing when someone rides by on a bike with the seat remarkably too low. Brewer sort of wants to tell them to stop so he can raise the saddle, which would be fine in a small town where we all knew each other, but this isn't really that kind of small town.