It is not advisable to absorb qi from any energy remnants. The energy remnants may contain negative energy and can harm you. There are many source of positive energy in nature that you can absorb to nourish your body. Yes, you can share energy with animals. Acupuncture and energy healing are being done on animals as well.
Some animals can assist in their owner's energy balance.
There is a damaged Oak tree in our neighborhood that has been uprooted. It is half standing, half falling down. Each day for three months as I walked by the tree, I felt it calling out to me for help, but I had no idea what to do other than send a message to it saying everything would soon be alright. After reading your book, I believe this tree is attempting to contact me for help. My wife and I tried to push the tree back into a fully upright position, but we were unable to move the tree one inch.