Question
chipmunks are living in our rock wall.  I want to get rid of them because they are ruining the wall.  I'll do anything that won't harm our dog.  help!  thank you.

Answer
Chipmunks

Probably the best way to control chipmunks is to trap them. Be sure to check state and local laws to see which control methods are legal in your state.  Rather than repeat a lot of information you can print on your own, visit http://icwdm.org/handbook/rodents/ro_b13.pdf    This document is part of the Prevention and Control of Wildlife Damage book which is the 揃ible?of wildlife damage control in the U.S.   
Don't bother yourself with those silly ultrasonic devices. There is no scientific evidence that they work. Repellents are less than effective for domiciled chipmunks. Getting rid of food supplies such as bird feeders can also help reduce chipmunk problems in the future.

You know the infestation is over by corking the hole with newspaper. If the paper isn't chewed through or removed in seven days (good weather only),  then you can be reasonably certain the hole is no longer active. Then secure it by filling it with foam and covering with aluminum flashing. Unless the situation demands other materials.

Disclaimer: As with any activity, remember that animal damage control comes with its own risks and problems which can include but are not limited to legalities, health threats, and personal liabilities. Be sure to follow all state laws governing wildlife and make sure you have a thorough understanding on how to resolve the animal damage complaint. My advice is only as good as your understanding of me and my understanding of your situation. If you have any questions be sure to write back.