Similar situation happened with one of our volunteers two years ago.
A homeless and alcoholic Vietnam vet needed treatment but refused to go because no one would take his German shepherd. The volunteer got a kennel to board the dog free of charge, stored his vehicle at her business, and paid his vehicle registration fees.
Once he got out of the VA hospital, took his dog and vehicle and drove off, barely thanking the volunteer and kennel for their help. Never heard from him again.
Our volunteer also contributed to get the dog out of the SB shelter.
there’s all kinds out there. many of the people Jesus Himself healed never returned to thank Him.