not hungry?

[kreaturekeeper]

Hey guys I have a 2yo ball python that has gone off food. Now I know this is not rare but I have a few concerns. Last year in the end of winter she went off food too. for about 3 months. This was stressful enough for me haha but I know thats not too irregular. Now this year she went off food about the same time and hasn't eaten since. That was almost 6 months ago..... I have been offering her f/t as always and she could not care less. Nothing has changed in her temps humidity or routine otherwise. I have tried to not worry cuz this is normal but now this seems to be a little long. I thought maybe it was longer because she was really pounding back the food like crazy before going off. I have tried smaller prey. Cutting open its head. leaving it in front of her hide overnight and not disturbing her. She never gives it even a second look. She looks like she is losing weight and I am getting worried.. Any extra suggestions??
thanks so much.