My pug is loosing fur on her back legs?

You can pull it right out.....it looks like she is just fluffier back there.......there are no sores, balding, or anything else.................she looses hair everywhere......she is a pug.......but she has a fluffy backside (under her tail) and it's fluffy and you can pull hair out by the clumps.......but once again......still tons of fur there.............no sores or bald spots.........everything else looks o.k.......she's on benedryl for allergies.........utd on shots, spayed, flea/tic meds, .........she hates to be brushed so we do it only once in a while and lint roll her the rest of the time...............does her fur fluffs on the back, seem normal?