Hi i have 3 chickens had them about 8 months they are on layers mash mixed with potatoe, I am going away soon for 5 weeks and wan to give them layers pelletts as it will be better for my friend when she looks after them, have tryed for a week but they will not eat them, so gone back to the mash, will they eat the pellets if i dont give them anythnig else, or will they starve first.