True. It is crucial to keep in mind that most stem cell treatments, apart from bone marrow transplantation, are still in the research stages and have not undergone clinical trials. Studies in animals are being done but with an eye on proving that a treatment works in humans, not for the benefit of animals themselves.
Many of the research studies are done in Europe, Korea or even China where the standards of care and documentation of research validity may be less than perfect. These countries have been doing stem cell research longer than the USA because embryonic stem cell research was banned or severely restricted since 2006 by Presidential Decree.