A professional dog trainer gives one-on-one guidance.
Tips
usage
驯 carries a stronger 'tame / subdue' nuance (as in 驯兽 taming wild animals). For a pet-dog context, 训狗 (with 训 'teach / drill') is more common in modern speech, though 驯狗 is widespread in professional dog-training language like 驯狗师.
