No. If that would happen cows would be running around like crazy and never get any time to eat or rest. No, cow bells are used as a low-tech location device for farmers if their cows ever got out or moved away from the pasture she was supposed to stay in. Cow bells are very common in the Swiss Alps because there are no fences in the mountain meadows and cows are free to roam as they please.
bells were usually used for ringing...
Small bells can be said to "tinkle" or to "jingle" (although the latter is also used for pocket coins and the former is used for urinating). A tiny bell makes a ding sound, as opposed to larger bells going dong or bong.
carol of the bells
Bells typically are used to symbolize weddings. Bells may also be used to symbolize music, death, peace, or gathering for example.
Most cow bells were (and are) made from metal, not wood. Sounds from metal travels a lot farther than sounds from wood. But basically, a wooden cow bell serves the same purpose as metal cow bells: for a farmer to easily locate where the cow went, since most cows in the mountain regions are never confined to fenced areas.
Bells are used to help locate a bird while hunting
The bells invite people in to worship.
Cows like all mammals have breasts, they have udders, and there used to milk the cows.
In your sentence, tolling is another way of saying the bells are sounding, or the bells are ringing.
If you've seen the Swiss Alps you know that it is very hilly and mountainous. Cows often go wandering for lush grass, and so it makes it easier for the herdsmen to locate their cows by the sounds of the bells. What the they can't see, they can hear by the cowbells jingling as the cow move along.
the pagans used bells to celebrate the death of jesus
People say "the bells, the bells" when they hear a loud noise because it is a common expression used to convey surprise or alarm at the loudness of the sound, similar to the ringing of bells.