I have a question about finding minions in oofa fruit. How likely is it to find one, and does it matter if your pet already has an attached minion?

It doesn't matter if they have a minion or not, but it's very rare

Thanks for the info!

My pets have eaten hundreds and I have only found two.

You can also feed the fruit to all your pets, it doesn't matter who finds the bugs, they all count. When I was going for that achievement, I collected tons of oofa fruit and fed them to all my pets. Poor little pets, nothing but oofa fruit for months!

There appears to be even chance for any particular fruit to be gotten from Ikumoradeekanox. The odds of winning one from Slots are around one in eighty last time I checked. One pet can only eat ten items at a time, but the Achievement doesn't care which pet eats the fruit with the bug in it so once you have a bunch of Oofas you can feed them all.