A newborn will not eat any feed. Calves won't begin eating feed until they're at least a week old. Otherwise, you really need to feed colostrum to a newborn for the first 12 to 24 hours, then gradually switch over to milk replacer. You can introduce feed to a calf early, but don't expect it to eat it all like a mature cow will, because a calf is pretty much like a human in that it is more of a monogastric than a ruminant. This means that a calf needs to rely much more on milk than feed for the first few weeks of its life.
A one month old calf should be drinking its mothers milk or being bottle fed also should be eating crass and mabe hay
Cereal grain is the best to feed a calf. This includes corn, oats, barley and rye.
This all depends on the breed. Three-month-old calves of different breeding will weigh more or less than the other. For instance, a Charolais calf will weigh more than a Jersey calf, or a miniature Angus calf will weigh less than an Angus calf (one that is normal in size and proportion).
Disease or a blockage in the gut will cause a calf to stop eating. This is something you need to take up with your local large animal veterinarian immediately if you wish to have a hope of saving the calf.
That all depends on what breed that beef calf is. A 1 month old beef calf can weigh anywhere from 80 lbs to over 200 lbs or more.
A 12 month old child should be OK eating any of the commercially available fish in the Supermarkets and Fishmongers.
I have no clue. Maybe you should take it to the vet.
500
6 months...
Around 300 lbs.
That depends on the breed. Since this is in the Jersey cattle category, the weight of a three-month old Jersey calf would be around 150 to 200 lbs at the most.
Depends on the breed and body condition of the calf. A 600 lb Jersey calf can be around 7 to 8 months old, whereas a 600 lb miniature calf may not be a calf at all, but a 15 month old heifer or bull. A soggy Angus calf at 600 lbs may be at around 5 to 6 months of age.
The most accurate way to tell the age of your calf is by looking at his front teeth. A newborn calf will have no teeth; a week old calf will only have maybe one or two teeth that have popped up already; a 1 month old calf will have all 8 lower incisors already.