The sodium bicarb, which is the most critical, runs about $12 - $15 per 1000 tablets. I used Doc Roy's Daily Care Extra Vitamins from Revival Animal Health as my kids didn't like the Pet Tab Plus. They were $21.95 for 180 tabs. For the Pet Cal, you can use Dicalcium Phosphate powder instead- a 5 lb container lasts forever… The Centrum Silver - just see what your local WalMart or Target sells it for. Probably the most expensive item is the Amino Fuel. Not sure what it's running now, you can check at GNC or other place that carries health foods.
Contact Cheryl Silver to see about joining the Yahoo group - I will send you her e-mail address in a private message.
Terry
Terry