For at least several days it seems that Elvis has been lethargic and much less active. I had the girls put vinegar in his water a couple of days ago, but I don't know if he drank any. We were out of town over the weekend and he seemed to just be standing around before we left. This evening, the girls found him fallen over (legs to the side) on the ground and vomiting a dark brownish somewhat translucent liquid. He has had the 'death gasp' as well. Upon occasion, he has gotten upright and they said he even stood once, but I don't know if he's too far gone. His crop doesn't feel full or squishy. Any ideas?