NEW YORK -- Taco Bell is taking another jab at McDonald's in a new ad for its breakfast menu.

The fast-food chain will begin airing a TV spot that is set to the tune of "Old MacDonald Had a Farm" and shows a man who has been eating Egg McMuffins since 1984. After trying Taco Bell's breakfast, the man trims his mullet, switches to tighter pants, gets a smartphone and takes down his "Loverboy" poster.

It's a follow up to another ad that featured real-life men named Ronald McDonald professing their love of Taco Bell's breakfast.

If Taco Bell seems fixated on McDonald's, it's with good reason; McDonald's has long been the heavyweight in the fast-food breakfast category with 31 per cent of the market, according to food industry researcher Technomic.