Hello I have a sick Astrolorpe, she is almost 2 yrs. old. It first started with an impacted crop. We purged her and fed her yogurt and water. She perked right up. That was yesterday, today she is unwilling to eat or drink and won't stand up. She is pooing alittle but it is very yellow, runny and sort of like "egg-white" consistency. Any ideas on what it could be?