Below is our walkthrough for Angry Birds Epic Winter Wonderland Level 5. One strategy is to trade out Matilda for more firepower again the Frost Hog. Using Red, Bomb and the Blues, attack as much as possible. Before the Hog attacks, use all three supporting abilities on Red to minimize the damage done to him. Feed the Rage Chili to the Blues to stun the Frost Hog and do maximum damage.
Note: This is the end of the Winter Wonderland side quest. Depending on when you took this path, the next level is likely in Canyon Land.