Lydia's losing her hair and going bald - hence the 'short' haircut. She could wear a wig I guess, and look like a freak! I am told she's VERY hard to work for, turn-over is huge in her restaurants. Maybe an unhappy employee who started that though!
I humbly disagree, I think Lainie, his daughter, is charming, smart and at 15, quite an accomplished linguist and 'cook's helper'. I also think it adds a little variety to Rick's strange vocal delivery. He sometimes sounds like the Travel guy "Wolfe" and his BMW ads. However I do agree that Claudia and Jacques daughters can be annoying.