I didn't say starve the cat.
I said stop feeding him and make him hunt down his own dinner.
The reason cats (like all animals) get fat in the first place is they're eating more calories than they're burning.
The only way to get thin is to change the imbalance by excercising to burn off the excess calories or to reduce the intake. The best way is to do both.
And, that's exactly what would happen if the cat had to hunt down his own food.
***And, that's exactly what would happen if the cat had to hunt down his own food.***
Until he catches a bird and the bones get stuck in his intestines.