What evidence does Grandin give to support her claim that animals helping humans can be good for animals too?

The evidence that Grandin provides for supporting her claim that animals are too helped when they help people is,

"That’s probably okay for a dog who’s been bred  to be a companion animal, but a lot of the bigger breeds and practically all of  the mix breeds were built for work. Having a job to do is a part of their nature;  it’s who they are. The sad thing is, now that hardly anyone makes his living  herding sheep, most dogs are out of a job."

Explanation:

'Dogs Make Us Human' is an autobiographical account written by Temple Grandin and Catherine Johnson. The article is about how dogs helps make human be human.

In the article, Grandin talks about how animals helping humans can also be good for humans. The evidence that she gives to support her claim is,

" That’s probably okay for a dog who’s been bred  to be a companion animal, but a lot of the bigger breeds and practically all of  the mix breeds were built for work. Having a job to do is a part of their nature;  it’s who they are. The sad thing is, now that hardly anyone makes his living  herding sheep, most dogs are out of a job." In this she is stating that when dogs helps human, it also helps them as it gives them a job to do.  

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