Every animal communicator has a different process but it can be done via phone or Skype. Most of the time, the professional animal communicator will ask you questions about your dog and request a picture.
If you want to spot any bad eggs then you should beware of animal communicators that just copy what you’re saying and wrap it up differently.
For example, if all you get is a narrow set of information about how your dog is happy, says exactly what you want and the person otherwise provides no verifiable information he or she couldn’t have known otherwise, it’s probably not a real animal communicator.
Seeking advice from professionals to help you get through a hard time is definitely nothing anybody should be ashamed of and if you’re aware of what to expect, it can be the right choice for you.
In other cases, the readings might create false hope that the dog is happy and about to return. It’s especially dangerous if your dog has behavioral issues and you try to solve them via telepathy instead of actual training.