Dead Rising 2

Basically, by feeding her the steaks you are healing Snowflake to full health at which point she will be tamed. If she took any damage during your fight with what's his face then you will need extra steaks. I personally found throwing the steaks to be fine, but what you want to do is throw them as she's running at you from a long distance away. I stood in the fairly open area where the card tables are, just outside the restaurant, and she had enough of a run up. She ate the steaks every time I did it like that, where's I couldn't get her to do it otherwise, by throwing or dropping the steaks. Oh and there is an extra steak on one of the tables in the restaurant.

I've done this a hundred times yet I've just figured it out :

If you have a weapon out, the tiger attacks you
If you have no weapon out, the tiger goes for the steak.

Try it out for yourself, the wife just got it on her first try and only got jumped once (immediately after the cutscene while she had her weapon out)

It will take 4 steaks if by chance he gets hit too much but zombies or you damage the tiger at all. He only joins at full health, I too took 4. Wife took 3

Nope.

When I played, it took forever. Just Because I threw the steak at Snowflake, doesn't mean she'd eat it. Also if there were zombies nearby, they would disrupt her, and she'd take off instead of eating it.

Also I believe the 3 steak guideline is based on an average amount of damage she has taken. I think she is tamed when her health bar is replenished, not after 3 steaks. So if it takes more than 3 steaks, I suggest stopping by the Wild West Place in the Food Court before heading here. In the kitchen there is 3 steaks, so you can nab them and you'll have more steaks for this achievement.