Hey guys very new to this just bought my first cow/calfs. Bought them from a local farm paid a little too much but was afraid of the salebarn at this point so it worked for me.. Hoping to build a good commercial herd in the near future but had to get my feet wet sometime so i started small.I have a couple questions 1) How is the best way to tell the ages of the calves I know one of them was born on christmas eve so he is easy but the other 2 look to be about 3 or 4 months old any rule of thumb??? 2) what type vaccinations should I be giving have one calf that will make the slightest cough every now and then no other symptoms easts well drinks good and is still getting plenty from momma the others seem to be ok just want to be on the safe side.. The cows are aged cows some more than others i have the newborn and the 2 calves and then the three mommas which are bred back...Feed and vaccination input would help ease my mind a lot.. Our local vet is not much on cattle more horses and small animals.. Sorry so long and help would be greatly appreciated... thanks....