Agnes shared this: http://earthinginstitute.net/pets-and-the-earth/
An excerpt:
I have treated many animals who have spent their entire lives in high-rise building without any contact with the Earth. I have advised their owners to ground their animals in some way. Preferably, take their animals outside as much as possible and let them have contact with the Earth’s surface. Indoors, you can provide a grounding surface for an animal with a copper wire attached to a metallic water pipe or an Earthing product. I suggest placing it in their bed so they get maximum contact time with the Earth throughout the day and night.
You would be surprised how just a simple thing like contact with the Earth can make a difference.