I am not a very good animal person because I was not raised with them. This summer, I housesat and took care of some animals for 6 weeks. Smarty, the Australian Shepard, is over 11 years old and is considered to be very old. However, he was very frisky and playful with me. I have my own young Chihuahua who is only 4 and Smarty doesn’t seem to act any different. In the beginning, he used to shiver and tremble, but he did less and less over time. I would add Trivedi Water™ to his dish regularly.