All of the vowels have been removed from following proverb and remaining letters broken into groups three each what is brd sff thr flc ktg thr?

Here's how we figure it out:

* brd: This is likely "bird" with the vowel removed.

* sff: This is likely "of" with the vowel removed.

* thr: This is likely "the" with the vowel removed.

* flc: This is likely "flock" with the vowel removed.

* ktg: This is likely "together" with the vowel removed.

Putting it all together, we get "Birds of a feather flock together".