Some other diseases Bos taurus experience are East Coast Fever (ECF) which is an acute, tick-borne disease causing high rates of morbidity and mortality in cattle, and Anaplasmosis which is a vector-borne, infectious blood disease.
To put it in perspective for a friend, see how high you can count during that time. Believe it or not, there actually have been people who have held their breath for even longer than 11 minutes, though. The Guinness Book of World Records has a special category for holding your breath underwater.
If you cannot hold your breath at full lung capacity for 20 seconds, then hold your breath for as long as you can and then increase duration gradually. This will set up your lungs to receive more and more air each time. Repeat 3 or 4 times in one series.