Quote Originally Posted by asplundii View Post
Yes and no. One of the crosses (can not recall which but I think it is the liger cross) results in an animal that can not regulate its growth. This is a result of inheritance of certain maternal factors. I am sure there is data on it somewhere
Yup. Ligers grow to extreme sizes because the growth inhibitor is passed to offspring by female lions and male tigers, so pure tigers get it and pure lions get it, but ligers(female tiger + male lion) apparently don't get it.

Tigons(female lion + male tiger) grow to "normal" adult large cat size(~500 lbs max?)

I don't really understand 100% how this works genetically, just what I've read.

"Hercules" is a Liger I think kept at a place in florida, and at just a few years old(3?) He broke 900 lbs, which is something like 150% the weight of an adult male lion. He was on Animal Planet a few weeks ago.