flock feed reader need a disable/stop button .

i love flock feed reader's and i don't want to change my feed reader .
i have about 50 feed in my feed's sidebar , and when i open flock i can't open any site till all rss loaded.
do you understand ?
it's very bad , if there was a way to stop loading feed it's could be very helpful , i think it's better to have button for temporary disable feeds from loading .
because some time's i'm hurry to do my job in internet and i can't wait . but i want to keep my feeds too ! then if i have a button to push and temporary disable feeds from loading i can do my job and then push the refresh all feeds .