So, Patrick you suggest to do a new plugin right? IS it the only way to not destroy the whole system?
In case of plugin in the link you've sent me where do I have to add code? I have to add code for usage like the 1st paragraph, i have to make a new directory in plugin or where ? A code for values, is it mysql? and there is an example with class of plugin where is this class? I went to the file directory Plugin and there is only the php codes...
Can you please help me a little bit more?
There isn't any way to add the animal in item type and make it from there, as I described above?
Deep Regards