If it is not possible to provide a congenial environment for a specific breed of animal without incurring huge expenditure which is economically not viable, then such new breeds are selected that are suitable for climatic conditions prevailing in a particular area.
The most glaring example is the Merino sheep well-adapted to the semi-arid climates of the temperate zone. Another common example is the Jersey which is more suitable for warm climates than other common dairy breeds.
Crossbreeding of animal types has also been successfully resorted to for developing desirable breeds. Certain sheep breeds have been developed for the purpose of producing fine quality mutton and high grade wool under different climatic conditions.