It's kind of hard when the information you have is the following: bought an expensive purebred dog- didn't want to pay for spaying and taking care of said dog and allowed dog to become neglected to the point that the lack of grooming was causing the dog to be deaf and have an infection and by the way, because she's not spayed, I will probably be seeing her again in a few months because the owner doesn't want to pay to spay her. Ugh!
This does not break client confidentiality, as the above is a case I've seen play out multiple times, with multiple different people of different backgrounds. The only reason we sometimes see these cases is because the holidays are coming up (Such as Christmas and even Super Bowl Sunday). People don't always directly say it, but I think they are embarrassed to have guests come over to the house and see what condition they are in. This is a sad circumstance. I'm sure there are lots of pieces of information I don't know about circumstances and mitigating factors, but it still gets to me. I try to educate people and I try to do it with charity, but when at the end of telling them how to take care of their dog, they just look at me blankly, it gets frustrating.
On the other end of the spectrum, there have been people sometimes that pleasantly surprise me. One young mother I remember ,who after finding out the family dog had diabetes, turned to her son and said, "Well, it looks like we won't be able to go to Disney this year after all." Not only did she make the decision to give up the trip to Disney to pay for the care of her "family member", she made sure her son knew that it wasn't a choice. You take care of your responsibilities and you take care of the pets that you choose to welcome into your life, even if it means you give up a much wished for vacation. I made sure I let her know I admired her parenting.

I will try not judge and try not to get angry with people. During a time after I dealt with the first situation described, my husband asked how my day was going, I responded with, "I wish some people could be re-incarnated as a neglected pet." I do not wish that truly, but I wish people would think more about neglect and that it isn't just starving your dog, there are many other forms. That said, my dog could use a few extra back rubs and my husband reminded me that my dog could also get bathed more frequently as well...