Before we can say you are feeding too much protein (which is possible) we need to know how much hay do you think you are giving them?
How much cake? Is that 38% cake all natural? I bet it contains
urea, and I'm not a fan of urea. Takes too much energy to
utilize it. It's fine for feedlots, but not for range cows. How much of
the 38% protein comes from an all-natural source? You can't count
urea when you are figuring a ration because, a range cow can't use it.
How is the health of the calves? Are these heifers getting mineral?
Lactating heifers/cows requirements go
way up. If you are feeding straight alfalfa, I would suggest
you get some grass hay for them. A few pounds of alfalfa is
fine, straight alfalfa isn't good. Not enough fibre, or dry matter.
I'm thinking these heifers were probably thin before they
calved. Once they have calved it's very difficult for them
to gain weight until they are on green grass. One thing we
have found that helps tremendously when cattle are first
turned out on grass is to set a hay bale, straw bale, what have
you--in the pasture with the cattle. Green grass in wonderful,
has everything in it cattle need, EXCEPT dry matter. Cattle
need dry matter, and by sitting a bale out they can get
the dry matter.
When we were first told this, we just didn't believe the cows
would go to the hay bale when they had green grass. We were
wrong. They eat it, but not like when you are feeding them
in the winter time. They'll get a bit as they go by the bale and
pretty soon, the bale is gone. We've had customers tell us
their heifers have bred back better since they put some hay
bales out on green grass. (Of course, they get Vigortone mineral,
too. :wink: Sorry follks, the :evil: made me do it.)

:lol: :lol: