Typically, you should tip your dog groomer 15 to 20 percent of the service total to show your appreciation for a good job. Tips should be whatever you can afford and are a token of you gratefulness. It's quite common for your groomer to give you extra services at no charge, such as teeth brushing or nail trimming. Keep all this in mind when considering how much to tip. Additionally, there are certain circumstances when you should the tip the groomer a bit more.
Here's a few examples of when you should tip the groomer extra:
If your dog bites or scratches the groomer. Tipping big will help here.
If your dog was extremely dirty and gross—especially with dog poo or mud matted to their hinds.
If your dog had extreme matting or shedding—this creates extra work for your groomer.
If your elderly dog is disabled and can't stand for grooming and needs extra support.