It works!

It appears that the "thing" has taken complete control over the frog's body.

When I put the slug and the frog in the same chamber, it shot itself straight inside the frog’s mouth, the frog to collapsed, where after a few seconds of twitching it woke up with jade green eyes.

The frog started to craw on the ground like a slug, and has taken a liking to the tree bark, which I have been feeding the “things” for the past few weeks.

I wonder if I can train it to act like a frog.