Megan was concerned over Grace's size and took her to the vet. Some texts contain contradictory information on the matter of sexual maturity and reproduction in midgets. This sibling did not have achondroplasia, was extremely healthy and was dominant, sometimes preventing Tellie from nursing. One would expect asp -miniatures to weigh half as much as a normal sized cat, however natural variation governed by numerous other genes [polygenes, modifiers] and also by environment means they are likely to range from one-third to two-thirds the size of a normal cat. While living as a stray, Darla had produced small litters of normal-sized kittens. Some of the miniature Siamese were aggressive towards other often larger cats and to other animals, including dogs. Achondroplasia dwarfism is the result of a dominant genetic trait affecting the hormones which control bone growth.
It also ensures that only the best and healthiest examples of the breed are used to perpetuate the breed and removes the need for neutering contracts often not honoured by buyers. For more details on genetics in general, there are plenty of resources on the web. A lack of thyroid hormone results in poor growth and dwarfed cats which retain kitten-like features. Her diminutive stature was due either to a genetic mutation or a congenital problem birth defect causing her to simply stop growing. Treker managed to mate with his own full sister, not a planned or ideal mating, producing 3 tiny kittens which were again attributed to inbreeding. Six months allows a better estimate of the cat's final size and to ensure the cat is large enough and robust enough to be rehomed.
DWARF, MIDGET AND MINIATURE CATS (TEACUP CATS) - HISTORICAL CASES AND RANDOMBRED CATS
In cats, MPS-I and MPS-6 have been recorded, both causing facial deformities short broad nose with depressed nasal bridge and spinal deformities. The absence of all or part of one sex chromosome causes Turner syndrome, which affects only females since an embryo having a Y chromosome but no X chromosome will not develop, but one with only a single X chromosome will develop into an apparent female. Overall, both cats were thick-set and the head was slightly large and best described as "rounded". In the past, cats at the lower end of the size range were homed or sold as pets, particularly in the Persian breed where a massive, cobby build is required by the breed standard. Litter number is small, which is in accordance with the general expectation for smaller breeds of particular animals.
Your cat must be full grown. The 2 small kittens were neutered and rehomed. The miniature cats were disposed of to another breeder and it has since been reported that the problem traits have been bred out and the breed may be on a sound genetic footing. In , I learnt of a line of dwarf Ragdolls that trace back to a common ancestor believed to be a stud cat. It was never in the best health and could not undergo neutering surgery.