It sounds like you could be using your own energy, instead of the universal energy, to heal your animals. A few months ago my Wife and I did a group healing session with Master Lin on the phone. He repeated his suggestion not to use the bathroom half an hour after the session so as not to lose energy. He said that if you couldn't resist the urge, to concentrate on the heart center and that would help preseve your energy. Perhaps that would work in your situation also. If I understood thelevel 2 material the middle dan tien (heart) is where the energy comes from when you heal others.