how do i get my animals to kill each other?

first,ithink they mean a animal going to eat but if not i usually have 1 polar bear in an exhibit with 5 penguins.about the tiger and bear thing ,i suggestyou take some out.

take away thier food

[color=red][/color] I think take the water and food then give it back when you did the photo

To get this photo:

1)Make the exhibit
2)Get a lion and put it in the exhibit
3)Make sure no food and water is in with the lion
4)Get a Thomsons Gazelle and put it into the same exhibit as the lion
5)Don't put any water in for the Gazelle either
6)Watch the lions status when it says hunting or whatever you want it to say then go into the exhibit with the camera

To stop the tigers and polar bears fighting try moving the tigers or polar bears exhibit somewhere else or seperate them if they are together

To prevent animals like lions and poler bears from killing each other KEEP ONLY ONE MALE IN EACH EXHIBIT

If you have African Adventure or Marine Mania, you can get live food such as lizards. Just place the lizards in the habitat for your animal to hunt. Or if you don't have that, take away the carnivore's food and water and place a prey animal (such as a gazelle or zebra). In a little while your carnivore will stalk it's prey.
About your tiger and polar bear problem... Keep only one male in each habitat or keep one crated while another is in your habitat. You can rotate between which goes in the habitat and which stays crated.

Make a small cage and put the animals you want to fighthunt in it then hide the fence(if you want it to look good)then they will fight/hunt this way is a lot faster.the bear and tiger just make 2 cages.:-D

For the photo, purchase a Predator animal if you don't have one already. Then, DO NOT buy food for it. Instead buy a lizard (If you have African Adventures Expansion Pack) or a Prey animal (if you place a Prey animal, think about what the Predator would hunt in the wild). The Predator animal will eventually get hungry and kill the Prey animal for food. Same with the lizard; the Predator will catch the lizard and eat it.
For your Tiger/Polar Bear problem.... Most animals are territorial. Most male Predator animals of the same species will try to kill each other for the purposes of obtaining territory or a mate. To fix this, keep only one male in each exhibit ( most male Prey animals are fine with multiple males). Hope this helps!

Use live food lizard

Polar bears and brown bears only accept one alpha male in the wild. So only add one male per habitat of these species. Grizzly bear will kill mooses when they are in the same habitat. Never put alligators and flamingo in the same habitat. Also in the savannah habitat never put lions or cheetas with any zebra or gazelle. It is their natural prey in the wild and they will kill the zebra or gazelle

Polar bears and brown bears only accept one alpha male in the wild. So only add one male per habitat of these species. Grizzly bear will kill mooses when they are in the same habitat. Never put alligators and flamingo in the same habitat. Also in the savannah habitat never put lions or cheetas with any zebra or gazelle. It is their natural prey in the wild and they will kill the zebra or gazelle