I used to grow prickly pear cactus in CA. Known as Luther Burbank spineless. Famed botanist that developed them for cattle feed. The pear has a lot of large seeds, making it difficult to eat the meat. I can't imagine the one could get juice from them. But very delicious. Neighbors would come and ask for some. I told them only at their own risks. Not easy to work around cactus, even if these are spineless, I had other kinds of cactus growing around them.
Rich source of magnesium and amino acid taurine and flavanoids - wide variety of flavanoids. Mexicans like to fry the paddles. Apparently starchy. The pear is supposedly good for cholesterol.
“Look! Out the window! There is a flying cow!” St.Thomas Aquinas looked, and they all burst into laughter. He calmly replied, “I would rather believe that the cow is flying than that my friends would lie to me!”