There is a very common myth that taking an animal’s food or toys away while they are enjoying them, will teach the animal to allow anyone to come up and take things from them. This “technique” at best, is usually viewed as an annoyance to the animal, but at worst it can trigger or create defensive behaviors such as resource guarding, growling, and even biting.
Instead of taking food or toys away from an animal, offer Good Things to whatever they are enjoying!
For example, calmly approach a relaxed pet (cat, bird, dog, pig, etc.) when they are eating their food, or chewing on a toy, and add another yummy piece of food, or another irresistible toy to his/her bowl or play area, then walk away.
This teaches your animal companion that approaching humans or brief touches that happen while they are enjoying their valued resource are Good Things! This technique helps to prevent resource guarding and other defensive or aggressive behaviors. It also helps to build confidence and trust with you, other people, and other pets!
You can see an example of how to do this here:
For it is in giving that we receive. ― Francis of Assisi
Recommended Reading: Myths, Truths, and Tips about Resource Guarding