A recent article on Retail Wire details how PetSmart, the big box pet supply retailer, plans to add in-home services to their revenue mix. Services will include dog walking, backyard clean-up and aquarium set-up, all in an effort to differentiate itself from Wal-Mart, which offers everyday low prices on pet supplies and even pets, such as fish.

PetSmart currently offers grooming, training and kenneling at many of its 1,137 stores.

“In-home services are a big opportunity, but we have a lot of work to do before we determine how to make that work,” Robert Moran, who became the pet retailer’s chief executive officer last month after serving as COO since 2001.

Conversely, any move by PetSmart into at-home services would put pressure on the many mom & pops currently supplying those services.

“I would really question the training of the people they would hire,” said Jill Tuesday, owner of No Furry Worries in Huntington Beach, Calif., a local entrepreneur providing dog walking and pet-sitting services. “You can’t just hire a bunch of kids and then expect people to let them into their homes.”

But then again, that’s exactly what Best Buy does with the Geek Squad.

Where are the opportunities to enhance your existing core business with specialized services? This is where a service design review can help.