I put my wort in the primary at 6pm on Mon. As I was leaving for work this morning, I stopped to check on the progress and stood there for about 3 or 4 minutes (I was in a hurry) without noticing any activity. This is only day three but when is a good time to move it to the secondary? And is it unusual for fermenting to slow down so quickly? It was really bubbling on Wednesday.
IMHO — NO.
Give it a few more days.
What is the FG today (Thursday)?
What was the FG yesterday (Wednesday)?
What was the FG the day before that (Tuesday)?
When the answer to the above three questions is the same, then you can bottle.
So NOT before Saturday (you had a lot of activity Wednesday)
You almost never need to use a secondary, anyway.
What’s a secondary? 
I go minimum 2 weeks. Longer if I need to ( or I get lazy )
I’ll have to check, I think my bottling bucket is labeled secondary, so I guess I secondary some of my beers for about 30-45 minutes
Thanks fellas! You just made life a little easier! So when is a good time to use a secondary just out of curiosity? I’ve even heard the term (are you sitting down) tertiary!!! What’s up with that?!? I can’t thank you guys enough for walking me thru my first batch!
Funny thing is that even that amount of time will drop some sediment out of the beer.
When people say “secondary” it really is for adding more sugars like fruit or whatnot. The practice of clarifying beer also has carried this term so it is confusing for many new brewers. You’ll be better served by leaving your brew in the primary for a couple extra days instead of using a secondary vessel.
You want to know why beginner brewers are confused about using a secondary vessel? The recipe posted on the AHA’s website for Deck Head Stout includes a Secondary fermentation for 9 days! This doesnt help! I guess it’s up to each indivduals preference to do secondary or not.