My cat has these little brown bugs in her fur? HELP!?

so my cat is a Himalayan, 4 yrs old, she has long fur. Recently Ive noticed little dark brown things in her fur. I didn't know what they were. I kept examining her fur until i found a LIGHT brown bug moving! Now there's 3 bugs and i still don't know what the dark brown speck things are. What should i do & what are they?!?!