Thank you all for you replies I will definately try all your suggestions. Will now try answering your questions....
I have 8 Rhode Island Red X White Leghorn. 7 of them are nearly 2 years old the other 1 still a chick. I am feeding them Barastoc Golden Yolk morning & night. They regulary have a combination of lettuce, cabbage, celery, spinach, cucumbers, corn (fav), all fruits. They love any type of melon & I give them the table scraps the dog or cat won't eat.
I was buying a mixture of different grains which they really loved but the fodder store owner told me that the chickens were unable to absorb all the goodness from whole grains & that pellets were far better.
My chickens graze around the yard all day pecking & scratching the lawn. Will try the dandellion & the mash this week & let you all know how things went.
Cheers all Andrea