A team of veterinarians scored X-rays of the bones for signs of arthritis. Megan and Bonnie, who had died at the ripe old ages of 13 and nine, respectively, did indeed have signs of arthritis, which was normal for their age. Megan, who had died at age four in an earlier outbreak of same lung virus that killed Dolly, did not. Even Dolly’s knee did not show signs of arthritis.

Arthritis also affects the soft tissue in a joint, so Sinclair notes the bones alone do not point to a conclusive diagnosis or lack thereof. (And Dolly really did limp.) But the overall set of data from Megan, Morag, and Bonnie as well as Dolly’s elderly sister clones suggest arthritis is no more common among clones than ordinary sheep. Fears about prematurely aging clones may be greatly exaggerated. “We felt the record needed to be set straight,” says Sinclair.

Even the fears about Dolly’s too-short telomeres haven’t quite borne out. Telomeres are repetitive DNA sequences at the ends of chromosomes, and they are shortened every time a cell divides. In 1999, scientists published data suggesting Dolly’s telomeres were too short for her age. Since then, scientists have cloned a whole menagerie of animals: mice, horses, cattle, pigs, dogs, and so on. Studies of their telomere lengths have turned up every possible result: Clones have shorter telomeres, clones have longer telomeres, and clones have normal telomeres—depending on the species or cloning technique.

Clones do have unique health problems, just not the ones that dominated headlines about Dolly. Clones are less likely to make it to term in pregnancy, and when they are born, they are more likely to be a little maladjusted. “You have to baby them—give them oxygen, give them glucose until they normalize,” says George Seidel, who studies animal-reproduction technologies at Colorado State University. The clones that make it to adulthood are generally pretty normal. But that makes it extremely expensive to clone livestock, on the order of $20,000 each. Despite much ado about cloned meat, cloning is not an economical way to produce cattle for meat or milk.

It does have niche applications in the livestock industry, though, like recreating million-dollar bulls with extremely valuable genes. Seidel, who also has an cattle ranch, buys semen from Final Answer 2, the clone of the famed sire Final Answer who died in 2014. Semen from the right bull is also incredibly valuable to the dairy industry. “You’ve probably had some cheese from the offspring of a clone,” says Seidel. But actual clones are not sold for food in the United States.

For all the attention Dolly once attracted, cloning itself has not radically altered the world. The research that created her did teach scientists a lot about how embryos can be manipulated, which has inspired new lines of research into stem cells.