Can you tell me about the taste and smell...I just bought some strawberry organic kefir and once I opened it I notice it had an odd, fermented sort of smell even though the expiry isn't until Dec 31st. I thought it would be exactly like yogurt, just thinner. Could it be bad already? This is the 1st time I've ever bought it and I don't want to get sick. Is this what it normally smells like?