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java.lang.NoSuchMethodError: ame.InstallationIntegrityTest()Z
at mod_FCBetterThanWolves.ModInstallationIntegretityTest(mod_FCBetterThanWolves.java:64)
at mod_FCBetterThanWolves.load(mod_FCBetterThanWolves.java:27)
at ModLoader.init(ModLoader.java:891)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.<init>(ahu.java:77)
at ahu.<clinit>(ahu.java:8)
at net.minecraft.client.Minecraft.a(Minecraft.java:394)
at net.minecraft.client.Minecraft.run(Minecraft.java:732)
at java.lang.Thread.run(Unknown Source)

you probably installed the mod wrongly.

Do you have Forge and ModLoader installed?