Dire Animal template by Joe Public (Gastaban).  no rights reserved.

Size: Increase to any size you like.

OldSize	NewSize	HD	Str	Dex	Con	Natural. AC	CR
Dim.	Tiny	+2	+2	+1	+0	Same		x4
Tiny	Small	+2	+2	+2	+3	Same		x2
Small	Medium	+4	+4	+2	+2	+2		x2
Medium	Large	+4	+8	+2	+2	+3		x2
Large	Huge	+8	+8	+0	+0	+4		x2

Init: Same
Speed: Same
Natural AC: See chart.  If no size change, Natural AC is +2.
Size AC: As size of creature.
Attack bonus: As cleric. (remember factors such as STR, DEX, feats and size)
Damage bonus: add 1 die type per size increase.  nil-1d3-1d4-1d6-1d8-2d4-2d6-3d4-2d8-3d6
Face/Reach: Use judgement call.  5x5 could go to 5x10. 5x10 could go to 10x20
Saves: as monk
Skills Points: +1 per HD
Feats: +1 if no size change. (good ones to choose: rend, rake, rage, improved grab, pounce)
Charisma: +4


Example:
Dire Rhinoceros
Huge Animal
HD: 16d8+80
Init: +0
Speed: 30 ft.
AC: 9 (-2 size, +11 Natural)
Attacks: Gore +24 melee
Damage: Gore 3d4+12
Face/Reach: 10x20/10ft
Special Qualities: -
Saves: Fort: +15, Ref: +10, Wis: 11
Abilities: Str 34, Dex 10, Con 21, Int 2, Wis 13, Cha 6
Skills: Listen +19
Feats: -
CR: 8



Dire Toad
Large Animal
HD: 12d8+48 (102 hp)
Init: +4 (dex)
Speed: 10 ft.
AC: 18 (-1 size, +4 dex, +5 natural)
Attack: Bite +11 melee
Damage: Bite 1d8+3
Face/Reach: 10ft by 10ft/5ft.
Special Qualities: Causes warts. ha!
Saves: Fort +12, Ref +13, Will +10
Abilities: Str 17, Dex 19, Con 18, Int 1, Wis 14, Cha 8
Skills: Hide +21, Listen +13, Spot +9
Feats: -
CR: 4