A perfect storm is gathering that may make investing in a livestock ETF one of the best profit plays for 2008.

According to a report by Bloomberg, cattle prices may rise 13% by the end of the year on the Chicago Mercantile Exchange and Brazil’s Bolsa de Mercadorias e Futuros. More from this story:

Not since 1996, when corn reached what was then a record $5 a bushel, have cattle been this cheap relative to their primary source of feed. Cattle are the seventh-worst performer of the 26-member UBS Bloomberg Constant Maturity Commodity Index in the past year, a time when soybeans, oil and copper jumped to records. After adjusting for inflation, cattle are down 27 percent from their 1988 peak.

“It’s pretty certain that we’ll see a decline in domestic supply in the U.S.,” Joesley Batista, chief executive officer of JBS SA, the world’s biggest beef producer, told reporters in Sao Paulo on May 15. “As a result, we’ll have price hikes and improved margins.”

Production also is dropping or failing to keep pace with demand in China, Brazil and the European Union, mostly for grain-fed beef, analysts and government data show.

“We expect meat prices, especially beef prices, to rise this year,” said Peter Weeks, chief economist at Meat & Livestock Australia, a trade group in Sydney. “We’ve already seen big increases in beef prices in China, Russia, India and throughout Southeast Asia.”

Now is a great time to invest in a livestock ETF, says Ian Davis in The Growth Stock Wire. And hog prices are set for a similar upswing to cattle prices.

“Hog farmers are not running charities. When the input costs for hog producers soar, the price of hogs must also rise. By buying hogs, we are piggybacking (excuse the pun) on the uptrend in agriculture and crude oil.

“So when the uptrend finally begins, how should we play it?

Read on how to profit when this upswing kicks in with this livestock ETF.

“When the gold price rises, jewelry gets more expensive,” says Tom Dyson in DailyWealth. It’s the same way with farm animals. When the corn price rises, livestock must get more expensive. Corn has doubled in the past 18 months, but livestock prices are still in the same range they were six years ago. They will catch up with corn.”

Tom also recommends that his readers invest in a livestock ETF.

“Two trade in London under the symbols CATL.L and HOGS.L,” says Tom. “They track the Dow Jones AIG sub-indexes for live cattle and hogs.”