You will have to push hard because the cow will be straining against you to push you out. Keep your wrist rigid and in-line with the rest of your arm, and keep your elbow flexed slightly so you have enough strength to push into the cow’s rectum.
It takes a lot of practice to know what you’re feeling for. Often it’s best to preg-check 2 to 5 months into the cow’s gestation period, so that you know you are feeling for something larger than a golf-ball sized ovary. The sizes you should be feeling are according to how far along the cow is:[3] X Research source 2 months - size of a mouse 3 months - size of a rat 4 months - size of a small cat 5 months - size of a large cat 6 months - size of a small dog 7 months - size of a Beagle These size comparisons are useful if you have a dead premature calf that may have been aborted. A vet or bovine practitioner who has had more experience and has preg-checked more cows will be more accurate than one who has done only a few cows. Thus saying, the more practice you get or the more chances you get to preg-check cows, the more accurate you’ll become.
