It might look small, cute, and adorable, but please do not be deceived by its looks. Mini cow health can be affected by several issues, and it is important to watch out for certain warning signs that may be life-threatening. The first step towards ensuring good health of your cattle would be to know these signs.
Cows naturally dedicate a considerable portion of their daily routine to feeding or grazing. Should your mini cow stop feeding, reduce its feeding intake, or not show interest in its preferred feed, be wary.
There are several causes for alteration in appetite, which include digestion, illness, pain, oral problems, and more.
Watch for:
Digestive issues can appear rather quickly in cattle. Signs such as bloating, pain, distress, or breathing difficulties can point towards an episode of bloat.
Some possible digestive issues can also be diarrhea, constipation, or abnormal poop.

Should your mini-cow show an enlargement of its belly, particularly on the left side, consult your vet immediately.
Mini cows will still require regular hoof maintenance. Hooves that are excessively long, cracked, diseased, or sore could hinder their ability to walk.
Look for:
Proper monitoring and trimming of the hooves will help to avoid difficulties.
Though coughing once in a while might not indicate any trouble, coughing continuously does suggest some concern.
Warning signs include:
Respiratory disease can spread among cattle, so early veterinary assessment is important.
Parasites can cause problems for a mini cow in terms of its health status and even growth rates. Some symptoms may be weight loss, diarrhea, an unhealthy coat, excessive scratching, or the presence of parasites.

You can consult a veterinarian for a parasite control program that will suit the age of your cow and other environmental factors.
In case you face any problem related to your mini cow, like breathing difficulties, fainting, inability to stand up, bloat, injuries, or anything else, then you must contact a vet immediately.
Mini Cow cannot tell you that she is in pain, but changes in eating habits, activity levels, behavior, respiration, droppings, and physical appearance can reveal a lot. You should take time each day to observe your cow. Spotting symptoms early leads to faster treatment and better recovery.
References Link: https://www.researchgate.net/publication/228971395_Miniature_Cattle_For_Real_For_Pets_For_Production