A nice seed where you spawn next to mountains. Believe it: there is NO other seed with this amount of pigs! And those mountains have a lot of caves.
X: 95 / Y: 64 / Z: 224
The swamp biome you spawn in. Plenty of pigs and cows.
X: 275 / Y: 64 / Z: 222
Small forest biome. No other animal spawn here tht`s not wolves! Some small islands near.
X: 176 / Y: 107 / Z: 21
The Extreme Hills themsleves! "Pigfull".
X: 166 / Y: 97 / Z: 31
Trust me: jumping here is suicide. You were been warned.