"I started sharing photos of the animals I work with to get people more invested in caring about wildlife," Cortez told Thrillist. "Specifically, as a rescue zoo, we take in animals who are unable to be released into the wild and, for the most part, that is due to human interference, the exotic pet trade, etc.
"A lot of effort goes into getting our animals to voluntarily cooperate in procedures like these," Cortez continued. "Positive reinforcement training allows us to do that. The basic premise is that we reward desired behaviors and ignore undesired behaviors. It is the only training method we use, so treats are definitely the standard."
One responder on Twitter quickly noted she should also subtract the weight of the walnut. "And the weight of the three other walnuts I gave him before this," she replied.
Her tweet spread over the weekend, prompting many to re-share old tweets on the topic or share new photos of how they weigh animals. Below are a few of the stranger and more charming examples.