Thinkers also come in Salmon and Duck

you can increase the challenge by placing the treats in the hollow block

copper amino acid chelate

The high level of protein

Oxbow Essentials - Young Guinea Pig Food Size:5 lbs Thinkers also come in SalmonOxbows Essentials Young Guinea Pig Food is formulated to meet the specific nutritional needs of young, pregnant, and nursing guinea pigs and help them thrive. This complete and balanced young guinea pig food contains Alfalfa hay to provide optimal energy and the fiber essential for healthy digestion. We then add wholesome ingredients and vital nutrients to meet the growth, energy, pregnancy, and nursing needs of guinea pigs. Guaranteed Analysis