Whats wrong with my bunny?

Question
I have a holland lop who's about four years old, and last night she wouldn't eat her lettuce (which she is usually very eager to receive). Today, it was gone, but she still hasn't touched her pellets and she's been very sleepy/lazy ever since yesterday too. Also, her poop pellet are bigger and softer than usual and are a bit liquidy. She doesn't seem very happy to see me, and she just sits and sleeps. I'm worried, and I wonder if you could speculate as to what is wrong. I gave her one strawberry a couple nights ago, but that's the only thing that has been different from her normal routine. Please answer ASAP and thank you for your time.

Answer
If you gave her a strawberry which was different from her normal diet,this was most probably the cause.  Leave her to rest with lot's of fresh water and food,and she should be ok.  No more strawberries though..this could cause her digestive upset...good luck,Elizabeth