yesterday she was off her food a bit but ate some last night. when i got up this morning she had pooped twice in the house! i put it down to her having a late meal, she was itching to get out so i let her in the back garden and she seamed ok, had a wee and sniffed around but didnt want to come back in so i left her out there with the door open, i went to check on her and she was eating grass. she came in and was sick twice, first time it was a little lump of brown stuff, then the second time it was grass. she does not have a temperature and she seams happy enough, shes not laying around with no energy or nothing shes still happy to go out but continues to eat grass so i have called my vet who is in am emergency atm so i will get a call within the hour. what could be happening? she hasnt eaten anything out of the ordinary