Do not tell the original owner that you are not ever selling, do not put in that in an email, nothing you dont know what will happen in the future. Give her some time, she may decide to give you information. Let her get used to the idea that you have him. I have 3 horses given to me, one was signed over, i gave first rights, turned into a huge battle, person is still going around saying how I stole her horse. Pay for what it cost to keep and the horse would have been returned . she wanted the horse back after a year and not pay for feed . threatened me with animal control. So now I have a receipt from her saying she has signed the horse over to me with no conditions, with a release of records from the Vet. stating she signed the horse over to me. Other horse, was skin and bones darn near dead, found an original owner, same thing, the horse was to be rtd to orig owner, she offered to buy the mare back and i said sure with the stipulation she not be bred again, well that started a small war, said she was gonna sue me, said go for it. 3rd horse, no one wanted to claim him as being theirs, did not want to give any info. I still have all 3 horses. I never hear from the 'original' owners. So dont sweat it.