first you need to see the receipt from the witch, it called love potion or something like that. Gather the ingredients and make it together with the witch. When done go home and give the potion to her. She will said she is feeling hot at first then you can go to bedroom she will there locked the door and yes you can choose between Doggo or Cow. The one that bugged is Cow.
And last WTF FUWAMOCO!?!?