The AZA released their white paper on the breeding and keeping of white lions and tigers (and king cheetahs) in 2011. Since that time, quite a few zoos have still produced cubs, either by breeding two cats that are known to carry the recessive genes or by outright breeding white animals, like Toronto did. I've also come across a few smaller zoos that are leasing animals from breeding facilities that include a wealth of false information on their websites and take poor care of their animals (based on photos, etc.) Does the AZA actually enforce their own policy? https://www.speakcdn.com/assets/2332/aza_white_paper_inbreeding_for_rare_alleles_18_jan_2012.pdf
At the time Toronto Zoo recently had bred and produced white lions, were not AZA accredited in fact they lost the accreditation due to elephants but recently got it back. there have been studies that prove white tigers and lions do not have to be inbred to be white.
White Lion breeding isn't very serious as long as it is done correctly (no inbreeding) and not for spectacle, just treat them like normal Lions. This is because White Lions are much more natural in the wild and aren't as genetically messed up in captivity. The population is somewhat healthy and inbreeding isn't a serious issue. The same sadly can't be said for White Tigers which are not as common and have much worse breeding issues. Many White Tigers are extremely inbred so breeding, not just on an AZA scale but all over the US, should be halted immediately.
Just wanted to point out an untrustworthy and incorrect site about white tigers: whitetigertruths.wordpress.com
