My poor little siamese girl finally been spayed. Before i picked her up she pulled out a stitch and so now has a plastic cone collar. She's not impressed. She's finally calmed down and is eating really well. However she's not used her litter tray, instead weeing on my son's bed. The only other time she did that was a noisy halloween party when she was too scared to come down. Please tell me she'll use it again!!!! Spaying only today..... help!