i need to find the forum that says what happens to pets that go though the rift. but i don't know how to search forums.

The search function disappeared a long time ago, I usually resort to Google. ;)

I don't find a specific thread, but here on subetawiki you can find more info: https://subeta.fandom.com/wiki/Riftborn#How_to_Obtain

oh, that actually does answer my question. thanks

The pet that gets tossed into the rift will vanish temporarily from your pets list. It will come back from 1 hour to 3 days randomly. So don't panic when the pet poofs! ^_^ The pet will be changed into a Rift color or Rift experiment when returned.