Before Jasmine passed away, she started acting "wierd". We figured she was starting to go senile. She couldn't see or hear very well. She seemed to either ignore what we were saying or just not comprehending what we wanted her to do. She wasn't too thrilled with the puppies, but she didn't like Sandy either and they turned out to be great pals. However, when Sandy was a little puppy, she was 3 years younger. Jasmine was 11 when she died. My vet told me that 12 is the average age for a collie. I have had several, and that seems to be acurate, in my experience anyways. It is sad to watch these dogs you love change before your eyes.
If only they could stay the way they are at about 5-6 years old. wouldn't that be great!