Jace, I have experience a kinked tail twice in a tadpole that Ive raised and they seem to do just fine. I sort of thought they must have put their tail out sort of like how we would put our back out Lol. But it did not effect the morph at all. They tail stayed kinked through the whole process though. Once the tail was gone then there was no difference to the other frogs.The swelling that your tadpole has is not something that Ive seen though sorry. Its good that he is still lively and eating. I hope he will be OK.