Your pup may be a bit young for eggs. He is barely weaned. I usually start my pups on an egg every few days by about 8 weeks, sometimes later. By 6 months they get either a whole egg or just yolks daily.
Chip, the cholesterol is found in the yolk along with the fat and most of the calories (plus tons of vitamins, fatty acids). The whites contain the bulk of the protein, but also that enzyme that inhibits biotin absorption (when fed raw) so that is why whole eggs are fed (plenty of biotin in the yolk).
Here is some information on eggs from my holistic vet:
“The diet of chicken’s is key to the superior fatty acid profiles in omega-3 eggs. For high omega-3 eggs, chickens are fed flax. Chickens are able to convert the oils in flax into more usable forms of fatty acids better than a dog or cat can. For high DHA eggs, chickens are fed flax and algae, with the same good results. Better food, better chicken, better eggs! High omega-3 eggs, such as Eggland’s Best, have good fatty acid profiles and good levels of vitamin E. It’s always a good choice if you are able to buy eggs that are locally raised. You may feed raw or cook eggs lightly (if you wish) but keep the yolk intact and uncooked to protect the fragile fatty acids from exposure to air and heat. Some dogs don’t digest raw eggs well but do fine with them slightly cooked. Eggs provide Vitamin A, Riboflavin, Folate, Vitamin B12, Iron, Selenium along with the Fatty Acids mentioned above.
Eggs should not be the mainstay of your dogs’ diet but it’s great to feed eggs a few times per week. Feed amounts should be cut back slightly depending on how many eggs are fed.
If using the shells for a calcium source, it must be ground up to a fine powder to allow the dogs to absorb them, but you should not feed eggs shells if your dogs’ diet already includes a calcium supplement as it would be more than what your dog needs. Too much calcium may be harmful to large breed puppies. They can also bind to other minerals making them less available to your dog."
Wow, that's young! Good thing you are the one who took him and are concerned about his well being! Congrats!
You may want to try a high quality food like Non-Grain Fromm's or Acana.
Here is the info.
Acana Regional's (Grain Free) ACANA PET FOODS | Acana Find a retailer: Store Locator | Acana
Fromms 4 Star (Grain Free) Four-Star Gourmet Recipes for dogs - Fromm Family Foods Find a retailer: Fromm USA Retailers
You should also consider adding Omega's and Digestive Enzyme/Pro-Biotic to keep his gut healthy since 75% of disease begins in the gut. Not all Digestive Enzymes/Pro-Biotics are created equal in supplements. They can be made up of very undesirable ingredients.
The following DE's/PB's are mostly organic and all human grade ingredients.
Digestive Enzymes + Pro-Biotic Combination: Digest All Plus The Wholistic Pet
Sunday Sundae –Digestive Enzymes + Pro-Biotics: Sunday Sundae Nutritional Supplement
This is a really great grade of Salmon Oil.
Wholistic Wild Deep Sea Salmon Oil™
• Provides levels of both omega-3 and omega-6 essential fatty acids
• Natural, pure oil is made only from wild, non-farmed salmon and stabilized with natural antioxidants
• Helps to maintain a healthy skin and coat and promote strong immune, cardiovascular, and nervous systems
Free of All Pollutants & Heavy Metals!
Always remember to introduce any new food, treats, or supplements very slowly so as not to cause gut upset.
Good luck with your new little Fur Baby!