My dog trainer explained this to me like this: trust is like a bank, you build up and store a lot of trust, and sometimes you spend some trust, but if there's a lot banked up it will be fine.

The first day I got my dog, he had parasites in his ears and stomach. We had to force down gross medicines into his ears and his mouth, and he hated it and us for it.

Three years later we have built up so much trust that I clean his ears every bath and he stands still and waits for me to do it. He still hates it, but he trusts me and knows that I'm not trying to hurt him.