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Answer.
You can certainly undertake scientific experiments and pursuits on your own, if you have the mind for it, but...
Most states (probably all of them) in the United States require that veterinarians be licensed. In order to obtain the license schooling of some sort is required. If you practiced veterinary medicine...
No but
on the Jurisdiction you are in.In some places you are technically only have to be "Called to the bar"The reality is that only legally educated and tested persons will ever be called.This...