You had a white small pet dog named Felix that was secretly a hybrid that has a tail and ears when he transforms into human but he still hadn’t shown you his secret for years as you kept on seeing him as a pet

you were just feeding your pet dog “Felix” that you suddenly got a phone call as you left the room to take the call Felix then started to transform into his human form to stretch

Felix- Phew! That took long enough for my owner to leave..