…[P]et cloning is closer to a scam than it is a service....I think from what's been learned so far in animal cloning, it's highly likely to produce stillborn, dying and sick animals.
(Arthur Caplan, Director, Center for Bioethics, University of Pennsylvania, Marin Independent Journal, 2/23/03)
…[C]loning remains an inefficient process with typically 0.5–4.0% of embryos becoming viable offspring. …[T]hese techniques must be improved before wide scale use….
(Paterson, L., DeSousa, P., Ritchie, W., King, T., and Wilmut, I. 2003. Application of reproductive biotechnology in animals: implications and potentials. Applications of reproductive cloning. Animal Reproduction Science, 79(3-4):137-143.)
…[A]nimal cloning so far results in high rates of abortions and neonatal losses….Many cloned animals display birth defects, including respiratory failure, immune deficiency, and inadequate renal function—all leading to premature deaths.…
(Schatten, G., Prather, R., and Wilmut, I. 2003. Cloning Claim Is Science Fiction, Not Science. Science. 299:344.)
In all mammalian species where cloning has been successful, at best a few percent of nuclear transfer embryos develop to term, and of those, many die shortly after birth. Even apparently healthy survivors may suffer from immune dysfunction or kidney or brain malformation, perhaps contributing to their death at later stages. Most frequently cloned animals that have survived to term are overgrown, a condition referred to as "large offspring syndrome.”
(Rideout, W.M., Eggan, K., and Jaenisch, R. 2001. Nuclear Cloning and Epigenetic Reprogramming of the Genome. Science. 293: 1093-1098.)
Will Genetic Savings disclose to the public how many cats, if any, have to be killed to make one marketable cat? The company spokesman had no answer.
…[C]loning a pet ranks as an essentially cosmetic application which is not morally justified. Just because someone is rich enough to pay does not make it morally justified, and indeed suggests a trivialisation of embryo science in diverting skills and knowledge away from meeting serious ethical needs on to something that for many would represent an excessive commodification of the animal.
(Church of Scotland. 2002. Animal Welfare and Pet Cloning Ethics. Society, Religion, and Technology Project, 4/7/02)
Cloning will not 'recreate' a loved pet. A clone might be 99.95% genetically identical to the original but it will grow up with a personality and behaviour all of its own. Clones can also be different physically: differences in nutrition within the womb and after birth can lead to differences in size. Clones will also have different patterns of coat colour than the original animal because this is not determined genetically.
("Cloning of Pets" Roslin Institute, 8/12/02.)