If you own a pet store, would you let visitors take photos of your pets?

A lot of people who started small business are actually people who don't have a real business mind. They need to think big, and look further.
Some of the owners are probably frustrated with all the people going into their store without buying anything upon leaving, but it has always been that way. You will always have more visitors than actual buyers. They need to get used to it. As for how many visitors can be converted into actual buyers, it is really up to them including how they treat the visitors.