Red kangaroo has the ability to freeze the development of an embryo until the previous joey is able to leave the pouch. This is known as diapause, and will occur in times of drought and in areas with poor food sources. The composition of the milk produced by the mother varies according to the needs of the joey. In addition, red kangaroo mothers may "have up to three generations of offspring simultaneously; a young-at-foot suckling from an elongated teat, a young in the pouch attached to a second teat and a blastula in arrested development in the uterus". The kangaroo has also
Kangaroo meat farmed product to compete financially against animals that have been killed by hunters under the government quota system. The kangaroo meat industry has attracted critical attention in Australia, the United Kingdom and the United States from animal welfare organisations. These concerns have centred on the hunting process, in which all kangaroo meat for the global market comes from kangaroos hunted in the wild. Australia's kangaroo hunting programme is the largest annual wildlife hunting programme in the world. A 2009 report from wildlife ecologist Dr Dror Ben-Ami for a University of Technology Sydney think-tank estimated that 440,000 "dependent young kangaroos" are