I did purchase some heifers at a sale barn when I couldn't get together with the owner on a price at the ranch. When I left his place I called the local sale barn and told them to call me if this guy sells some heifers. 30 days later they called and I bought them for a little over steer price...
Don't purchase any replacement females at a sale barn. Unless it is a special bred heifer sale and even then you are taking a chance on what they are bred to.
Find a local breeder or production sale to purchase your replacements. They will come with a reasonable fertility guarantee. Same thing...
When we buy cattle direct from the backgrounder they are weighed at the ranch before going on the truck. We deduct a 2% shrink from the weight and pay on that number. I would say they are coming out ahead from weighing them off the truck at the feed yard.
This says it all. Keep your cows moderate frame and then mix in some terminal sire lines. Weaning a calf that is more than 50% of the cows body weight is a huge win. Stick with Coleman, Ohlde, Duff and even Griswold for bulls that produce keeper females.
I don't know where you are located. But Premier 1 Supplies in IA has about everything and will plan a fence for you if you want. They ship also. When I was traveling and fitting all the time I bought my clippers and blades from them.
Call the rep for the Lick Tub company and ask them about it. They will be able to explain every thing that might be going on and how to handle it. Invite him to your place if you do some volume. They are always looking for clients to go direct. Also, ask him for any coupons on future tubs.
Keep it mowed this summer and then Fall spray your weeds. Fertilize in the Spring and spot spray any weeds. Ag Phd has a great program for pasture spraying if this is a grass hayfield.
Also a good article from Hay & Forage Grower...