You’ve gotten a bit into the weeds.
The eviction was served on Tenant. It made no mention of the horses because since it was her personal property. The eviction procedures were not followed in that she was entitled to a 90 day notice. Minimum since she was a tenant of the former owner (not the new owner) which is an exception when dealing with foreclosures.
Under NY law, if a Tenant is evicted and leaves behind personal property - the Landlord is required to store that personal property for 30 Days and inform Tenant as to the location as to where it may be retrieved. Landlord may not charge Tenant storage fees during that 30 day window.
IN the instant case, Tenant’s property (horses) were removed and should have been stored and their location divulged to Tenant. It was not. After the 30 day storage period had passed, only then could the Gentleman have achieved a stableman’s lien. he didn’t seek one.
He had no legal authority to sell the horses, whether using the eviction or a stableman’s lien as a basis for that claim.