Probiotics may endow rodents with a "mouse swagger"

[Emily]

The swagger got most of the attention, but the yogurt supplemented diet also produced leaner, shinier mice that were more successful breeders.
(Note that we don't know if there was a control - only a junk food diet simulation is mentioned in addition to the junk food diet supplemented with yogurt. We don't know if the protein contents of the two diets are the same, etc.)

Mice That Eat Yogurt Have Larger Testicles

Probiotics may endow rodents with a "mouse swagger"

By Elie Dolgin | May 4, 2012

Last summer a team of researchers from the Massachusetts Institute of Technology set out to better understand the effects of yogurt on obesity. They were following up on the results of a long-term study from the Harvard School of Public Health that had suggested yogurt, more than any other food, helped to prevent age-related weight gain...