"Everyone knows you can teach dogs tricks, but did you realize how good cats were at learning new things too? Cats love to work for food, so teaching them tricks for treats is the perfect way to have some fun." Vega knows sit and shake!
It's not true that cats don't feel pain like humans do. Cats mask their pain by instinct so that they don't become prey for predators. Here are the signs of pain to look for (hiding, appetite loss, etc)