I noticed a unusual number of pigs in my snowy biome and upon further look they appear to be the penguins this mod gives me. They do not walk like normal pigs nor do they drop pork when killed. I am sad to see this as I was looking forward to having penguins in my server.

Could you provide a screenshot?

I did up the amount of penguins that would spawn in a group because I thought they where rare. This is out in the middle of the snowy biome with a regular biome not for hundreds of blocks.

I have killed another pig and it dropped a fish. These are definitely supposed to be my penguins.

What version of Waddles and Minecraft Forge are you using?

The most recent one. 1.16.4-0.8.11. I am using Aternos for my server so the most recent copy of forge

That's your problem right there, using Aternos. It doesn't work with a lot of things.