- And got the T-shirt
Are they both gaining weight at the same rate? If so, they're both probably eating pellets. But you might put the pellet dish in a shaded location so she feels more protected, and maybe she'll eat more.
I'm also asking this for in the future, when they'll be switched to normal Timothy pellets. I don't want to deprive them, but for Truffle to get twice as many would also not be ideal.