What is the meaning of "pet au pair"?

Granted, this looks french, I've seen this used and referenced in English. I see it used a lot with dog walking businesses or pet sitting companies, although I have no idea what it means.

Google translates it to "pet au pair" in English (doesn't translate anything) and Googling the phrase only brings up more pet sitting websites.

Sounds like it is an au pair for pets.

Pet au pair

Typically, au pairs take on a share of the family's responsibility for ~~childcare~~ pet-care as well as some housework, and receive a small monetary allowance for personal use.

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