Small villagers are displayed as a tiny villagers

I found a small zombie villager, I gave him a potion and a golden apple, but when he was health, he looks like a tiny villager.

1.Just found a small villager
2.health him and wait for his metamorphosis.

---- Minecraft Crash Report ----
// Why did you do that?

Time: 04/08/15 01:14 AM
Description: Manually triggered debug crash

java.lang.Throwable
	at ave.s(SourceFile:1588)
	at ave.av(SourceFile:889)
	at ave.a(SourceFile:325)
	at net.minecraft.client.main.Main.main(SourceFile:124)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at bdb.a(SourceFile:309)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bew['Stanford Pines'/166, l='MpServer', x=-6,98, y=72,00, z=-7,91]]
	Chunk stats: MultiplayerChunkCache: 289, 289
	Level seed: 0
	Level generator: ID 04 - customized, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: 12,00,64,00,8,00 - World: (12,64,8), Chunk: (at 12,4,8 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 2164463 game time, 19409 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 31 total; [vn['Creeper'/5481282, l='MpServer', x=4,50, y=12,00, z=58,50], bew['Stanford Pines'/166, l='MpServer', x=-6,98, y=72,00, z=-7,91], tv['Oveja'/21, l='MpServer', x=-13,66, y=62,69, z=-31,25], bew['Stanford Pines'/166, l='MpServer', x=-2,46, y=64,00, z=21,08], tk['Murciélago'/4708970, l='MpServer', x=-9,59, y=49,10, z=14,00], to['Vaca'/50, l='MpServer', x=-9,31, y=61,88, z=26,63], to['Vaca'/51, l='MpServer', x=-11,53, y=71,00, z=-14,13], bew['Stanford Pines'/166, l='MpServer', x=-8,70, y=72,00, z=-7,50], bew['Stanford Pines'/166, l='MpServer', x=-5,58, y=72,00, z=-12,76], bew['Stanford Pines'/166, l='MpServer', x=-5,21, y=72,88, z=-13,70], bew['Stanford Pines'/166, l='MpServer', x=-8,40, y=73,00, z=-14,07], wi['Aldeano'/3319928, l='MpServer', x=-6,53, y=72,00, z=-6,13], bew['Stanford Pines'/166, l='MpServer', x=-5,74, y=64,00, z=-31,30], tk['Murciélago'/3378785, l='MpServer', x=-9,44, y=53,10, z=6,69], tk['Murciélago'/5570622, l='MpServer', x=58,16, y=19,06, z=-56,52], tk['Murciélago'/3061845, l='MpServer', x=-10,44, y=52,10, z=7,09], bew['Stanford Pines'/166, l='MpServer', x=-10,93, y=73,00, z=-2,30], wa['Esqueleto'/5595331, l='MpServer', x=4,50, y=47,00, z=36,50], wa['Esqueleto'/5595330, l='MpServer', x=3,50, y=47,00, z=36,50], bew['Stanford Pines'/166, l='MpServer', x=-7,45, y=72,00, z=-7,99], wi['Aldeano'/3319470, l='MpServer', x=-8,00, y=72,00, z=-5,56], bew['Stanford Pines'/166, l='MpServer', x=-12,94, y=71,00, z=-4,94], bew['Stanford Pines'/166, l='MpServer', x=-17,52, y=70,00, z=-2,89], bew['Stanford Pines'/166, l='MpServer', x=-20,93, y=63,00, z=-16,81], bew['Stanford Pines'/166, l='MpServer', x=-5,62, y=72,00, z=-12,33], bew['Stanford Pines'/166, l='MpServer', x=-9,07, y=73,00, z=-10,30], vn['Creeper'/5566140, l='MpServer', x=71,50, y=14,00, z=22,50], we['Zombi'/5566141, l='MpServer', x=73,50, y=14,00, z=22,50], ua['Lobo'/3361474, l='MpServer', x=-7,84, y=72,00, z=-4,41], ua['Lobo'/3361472, l='MpServer', x=-7,25, y=72,00, z=-3,57], wi['Aldeano'/5302700, l='MpServer', x=-7,31, y=72,00, z=-6,31]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bdb.a(SourceFile:309)
	at ave.b(SourceFile:2311)
	at ave.a(SourceFile:334)
	at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
	Minecraft Version: 1.8.8
	Operating System: Windows 8.1 (x86) version 6.3
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 148153784 bytes (141 MB) / 405536768 bytes (386 MB) up to 523501568 bytes (499 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Launched Version: 1.8.8
	LWJGL: 2.9.4
	OpenGL: GeForce GT 610/PCIe/SSE2 GL version 4.5.0 NVIDIA 353.30, NVIDIA Corporation
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

	Using VBOs: No
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: 
	Current Language: Español (México)
	Profiler Position: N/A (disabled)
	CPU: 4x Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz
[01:14:04] [Server thread/INFO]: Stopping server
#@!@# Game crashed! Crash report saved to: #@!@# C:\Users\Wrecker\AppData\Roaming\.minecraft\crash-reports\crash-2015-08-04_01.14.04-client.txt
[01:14:04] [Server thread/INFO]: Saving players
[01:14:04] [Server thread/INFO]: Saving worlds
AL lib: (EE) alc_cleanup: 1 device not closed
Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release