I recently (abt. 5 days) ago got 5 Californian show rabbits and they’re supposed to be 4-5 pounds by the show, which is in early January. However, they’ve stayed around 2.5-2.9 pounds. I am feeding them Petrus (food brand) and am giving them Timothy Hay. How do I get them to increase weight (I know about using oatmeal as a filler), and how fast do they normally grow?