Studies have shown spaying and/or neutering before growth plates have closed causes many health issues. It is recommend that you wait till they are 18 to 24 months old and never before a year of age. The video below is great at explaining the whys & hows.
What foods to feed?
Look for foods that meet WSAVA guidelines such as Eukanuba, Royal Canin & Iams to name a few. All of these companies employ a veterinary nutritionist, control their production lines & conduct AAFCO food trials.
Check ingredients. The first 2 ingredients should be protein with no peas, lentils or legume seeds.
Diet Related DCM.. What is it?
Dilated cardiomyopathy (DCM) occurs when the heart muscle becomes weak. This leads to a loss of the ability to contract normally and pump blood throughout the body. A common thread among affected dogs was the consumption of foods containing peas, lentils, other legume seeds, or potatoes as main ingredients. (Grain Free)