The Developers should read this if they want to fix bugs.
While i was playing this game i got this annoying bug where when you pick up 2 spirits at once (when they are on top of one another this happens) and place them somewhere else, one of the spirits gets DELETED. and the price of the corresponding animal doesn't get lowered by that. so the animals were getting more expensive just from this stupid bug. I tried some ♥♥♥♥ and now i know how to make them free.

It's really easy to get free animals

Here's what you have to do:

1. set the spirit free (by right clicking on it and then choosing yes)
   
2. and while it is still fading away do step 1 again (right click where it is)

• Every time you set it free the price lowers. Eventually it gets to 0.
  
• You can still click on it after it faded completely, just have to be fast and predict where it is.
  
• If you don't get the price to 0 just doing it with one spirit you can always get a new one and set that one free a bunch
  
• Free animals stay free (i think?)