Pink sheep in Minecraft are very rare, with a natural spawn chance of approximately 0.164%, meaning about 1 in 610 sheep spawned will be pink

. This rarity makes encountering pink sheep a notable event during gameplay. While pink sheep are the rarest among the standard sheep colors, there are even rarer mobs, such as the "cub," which has an even lower spawn rate of around 0.008%

. To summarize:

• Pink sheep spawn naturally with a 0.164% chance.
• This equates to roughly 1 pink sheep per 610 naturally spawned sheep.
• Finding multiple pink sheep close together is extremely unlikely due to this low probability.
• Players often consider themselves lucky when they encounter one.
• Pink sheep can also be obtained by dyeing any sheep with pink dye, which is a practical alternative to waiting for natural spawns

Therefore, pink sheep are among the rarest naturally spawning sheep in Minecraft, but not unique or impossible to find with some exploration or creative methods.