Smaller than usual cats occur for several reasons - some genetic, some hormonal and some environmental.
midget and cats Dwarf miniature
Location: Chapel Hill, N. Selective breeding for very flattened faces is an increasing problem in Persian cats. Sassman was told she could have the runt of the barn cat litter if she could catch him! There are suggestions that the strain had been derived from the jaguarondi. Retrieved 12 December
Specialty Cats: Dwarf, Miniature and Teacup Cats
If you are serious about bringing home a miniature kitten, research breeders and ask to join their waiting lists. He now has adult proportions, but is very small. He weighed 1 lb 8 oz, lighter than Pete at maturity.