The 14-year-old dogs were flown to the United States where they got to run on grass for the first time.
The dogs, Alvin, Simon and Theodore, were all placed in forever homes and treated for their ailments.
The Beagle Freedom Project recently rescued 38 dogs from laboratory testing labs.
The breed is the most popular type for lab use and the organization works to find homes for thousands of homeless and abandoned dogs.
Click here for more information on Beagle Freedom Project.