Biofine in Keg?

Northern Brewer General
1

I kegged a batch for the first time on Sunday. I forgot to add Biofine to the keg before I racked. I’m thinking about adding some now and shaking the keg a bit to mix it in. Bad idea?

Also, by adding a fining agent to the keg, should I expect a lot more gunk on the initial pour(s)?

2

I would just let it go my beer clears in less then a week. But I dont know about you I use Whirlfloc and I crash cool for a day or two. Is it carbed up? If so it can cause foaming if not then you should be good Id say go for it if it bothers you.