minecraft-bedrock-edition
I hold shears, face a sheep, and tap the button at the bottom of the screen. The sheep will take damage about 50% of the time. Otherwise, it will work fine.
I am careful that the button is not on the sheep but the crosshairs are.
I have tried 3rd person mode.
I have this problem with breeding any animals too.
Why does this happen and how can I fix it?
Explore the entire seed for two reasons: 1) I read that if chunks that generate animals haven't been "discovered," they won't spawn new animals. I walked my entire world but no new animals appeared. 2) I discovered on my tour that all the animals I hadn't killed had fallen down a hole. I tunneled them out and once I did, animals began spawning all over, including inside the fenced-in area I built. Back in the sheep shearing business!
Heart particles emit from mobs that are in "love mode" or are being tamed.
Heart particles emitted from a dog:
Animals that are "in love mode" emit hearts constantly and will path towards animals up to eight blocks away of the same species that are also in love mode.
You can send a mob into love mode by feeding it its specific food item. Each mobs food item can be seen in this table (click to enlarge):
In your case you have sent you chicken into "love mode" with seeds.
I recommend you read Breeding Mechanics on the Minecraft wiki for more in-depth information.
Best Answer
To correctly shear sheep you need to aim at them with shears and hold instead of tap. The process is similar to mining with a pickax in that you don't just tap to mine a block.
After tapping and holding while aiming at a sheep, it takes about one second for the wool to come off and fall to the ground, so it doesn't take nearly as long as mining does.