Hi! My doggy has this problem and I'm wondering if any of ya'll have any idea of wat its from:

Wen i woke up this morning, my doggies tail (she has a long tail, shes a Lab) was all the way down, like she was scared, which is weird cause her tail is usually all the way up.

She acted happy and fine so I went out for the day, hoping to return home and for her tail to be normal.

One of my friends told me that she might have an upset stomach, so I was going to look that up.

But I was petting her and lifted her tail up to see if it could stay up, and when i lifted it up, she started whining.

Do any of u kno wat could be wrong?