Fox Population Model
The fox population model is similar to that of the rabbits. The number of foxes alive at the end of the month is equal to the number of foxes alive at the beginning of the month plus the number of foxes born minus the number of foxes that die.
Fend = Fstart + Fborn - Fdie
The number of foxes that are born and die depends on the amount of food available for each fox.
Assumptions
Foxes scavenge for food; they only eat dead rabbits.