We just found a malnourished stray cat (not feral). We have taken her to the vet and gotten antibiotics, wormers and shots. She is young - probably 6-9 months old. The vet said he can not tell if she is fixed or not. He said she may or may not come into heat because of her weight for a while (she was skin and bones - weighted less than 4 lbs but is a good size cat with lots of hair). He wants to fix her or go in and make sure she is fixed. If she does not need the surgery, I don't want to put her though it (or pay for it). Since I don't know her true age, she is very under weight (but putting weight on), and since I guess she could even be pregnant (but doubt it because of her weight). When can I safely decide she is fixed if she does not come into heat? Thanks