When are you expecting the calves? I hate to say this and it is not being critical... but they do not need any grain on the grass you have except maybe once or twice a week to keep them friendly... and if the cows and heifers get too fat on it they will have calving problems. The calves will grow too big inside, the cows will have excess fat which will make the calving canal tighter... Cattle are designed to eat grasses and hay.... rough forage... grain has it's place but it is not with bred cows and heifers and developing fetuses..... save it and your wallet for the winter time to supplement lower protein feeds when it is cold.
They look good but almost look too good....don't kill them with kindness.... they should be, and stay, well rounded on grass pasture and hay in the winter... until they get old and they have trouble with teeth or lack of them... I don't think you have any that are old or are "broken mouth or smooth mouthed".
And I would suggest to not worm them regularly.... they will not develop any tolerance to worms, and the worms will develop an immunity to the wormer over time if they are constantly subjected to it. We will worm our calves after they are weaned off the cows. PERIOD.... the only time a cow gets wormed is if she is looking thin or has an exceedingly rough hair coat or does not shed out in the spring. Then, the worms have not built up any tolerance to the wormer and it will do a better job of getting them than if they have built up a tolerance.
If you are going to go through and worm, do them all and move them to a different pasture after 48 hours so anything in their gut tract will have a chance to be expelled...and no worm larvae have had a chance to climb the grass stalks yet; then don't worm again unless you see a problem. In that case, I would take a fecal sample from a thin or "wormy looking " cow to a vet to do a fecal test and see what kind of worms they are sporting...
When we call our cattle in to the pen, they will get a 5 gallon bucket for 15-20 cows.... they get a couple mouthfuls..... enough for them to think "OHHH TREATS" and not enough to let them eat for more than a couple minutes.....
Winter we feed more... but not alot more. They need the roughage - hay - to keep their rumen working good which also creates heat.
In summer the grass will keep their digestive tract working, but does not create as much heat since it is "wetter" and goes through them faster...
