Hi Lance-
Congratulations on the new pup. How exciting, a Great Dane! I don’t know if a probiotic for a puppy is really necessary. But, maybe others will chime in with their opinions. My pups have had digestive issues due to various reasons. So, I have used Vetri-Science soft chews, Total Zymes, and Natur Vet probiotics. Right now I am using Swanson’s Ultra Soil-Based probiotics. Swanson Vitamins is a very reasonably priced web site with many options to check out. The main thing is to buy a probiotic with as many strains as possible. In addition, check out http://www.dogaware.com. It’s a great website with information on many dog related issues, including probiotics.
Have you checked out the large breed puppy thread on this forum. It contains a spreadsheet of food that is appropriate for large breed pups due to needing restricted calcium levels.
Keep his weight down, his growth slow and controlled and limited running and jumping to help his joints healthy. Have fun and good luck!
