There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
Lions and tigers being very similar in morphology and ecology may lose up to 20% of body mass per year when they enter old age ( over ten years of age) , more drastic weight loss is likely to be due to injury or disease, this tiger was not old so it is unusual to drop from say 250kg to 180 in a few months is due to disease or injury.
I know of an old lion who was evicted at age 10 from a pride in Kruger when he was around 222 kg he died at age 14 and his mass was estimated at 102 kg so old animals can lose condition quickly but not young or prime aged animals.