I voted No. I think the workman is worthy of his hire.
But, if a trainer felt that he could drum up business by working for the shelter so many hours per week, and in return the shelter gives him recommendations when people adopt a puppy or call about having a problem with a puppy, it may work to his advantage to donate some time.
I do have a problem when anyone uses the words should and offer, or should and donate or should and volunteer. Any gift, be it time or money or services or prayer should never be compulsory.
Heidi Ho, Odie
Joy-Joy, Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.