Honestly you dont need to tame one of these at all. They are a very important Dino but if your just starting out and have no farm just make a little stone cage and find a few in the jungle, pick them up with a ptera or argent and place in cage. They can stay wild and still drop a ton of CP no need to waste sap or crops!
Starve taming doesn't work too well for 2 reasons
1. It's food bar may be small, so it may start losing health before it even gets close to tame time.
2. The cool down gap for eating cake, means that you need to factor in the eating time.
Hope this helps