Do you know the credentials of the trainer or behaviourist when you sign up for a training class or book a 1-2-1 session?
Unfortunately, the dog training business is not regulated and anyone can set one up without the necessary experience or qualifications.
It is advisable to see the trainers qualifications or see them in action before you make a decision. This will give you information as to whether their knowledge is up to date and how much experience they could have.
Here you can see my certificates and degree. I am happy to present the original documents if requested.