Strange behavior during our morning walk
I have a one year old yellow lab. When I took him for his walk this morning something strange happened. He started walking strangely (like he had less control of his legs), then kind of walked around in a circle 3-4 times, and then fell to the ground. He was laying on his side, and I felt like he looked a little out of it. I talked to him and petted him for about 5 minutes, and then tried to get him to stand up. The first time he tried, he fell back down. The second time he got up rather clumsily, but then he started walking. He walked slowly for the next 10 minutes and at first seemed to be leaning, but then he seemed to get back to normal.
We walk or run every day, about 4 miles a day. This happened less than a mile into our walk, and afterwards I just took him home. It was early in the morning, so the temp was in the mid-60's. I called my vet and haven't heard back from him yet. I feel a little worried though and wondered if anyone has any idea what happened. My fear is that it might have been a stroke or something. He's been sleeping since we got home, over 2 hours now.