I'm a new member so I dont know if product names can be mentioned but there is another site that has mentioned great things about something called Transfer Factor and Transfactor Plus. There is a Transfer Factor for pets but the vets who discussed it said that the ones for people were better. This is the dosage they gave:
human formula Transfer Factor to animals, as suggested by veterinarians at the 4Life Company:


Transfer Factor™ Canine Dosages Transfer Factor™

1 to 25 lb. 1-4 daily
26 to 50 lb. 2-3 daily
51 to 100 lb. 3-4 daily
100+ lb. 4-6 daily

Feline Dosage Transfer Factor ™ 1-3 daily

Transfer Factor Plus™ Canine Dosages Transfer Factor Plus™

1 to 25 lb. 1-2 daily
26 to 50 lb. 2-3 daily
51 to 100 lb. 3-4 daily
100+ lb. 4-6 daily

Feline Dosage Transfer Factor Plus™ 1-3 daily

Note: Some veterinarians start animals on a small amount of Transfer Factor Plus for 3 consecutive days and increase the dose gradually. The content of the capsule can be mixed with pet food or treats (sardines, cheese, etc.) Some pet owners find it easier to shove a capsule in the pet's throat or to mix the content in a little broth and use a syringe to inject the product into the animal's mouth. Although Transfer Factor and Transfer Factor Plus™ are best given throughout the day, satisfactory results have been obtained by giving the dose once a day. The 4Life company recommends to double or triple these amounts if the animal is ill in order to increase the efficiency of the immune system further. There is no report of overdosing on TF or TF Plus even when consuming massive amounts.

Five years ago, when Dr. Burlingame started using Transfer Factor and Transfer Factor Plus™ in his veterinary practice, he didn’t always get the results he hoped for. Since then, he says, he’s discovered that for maximum benefit, Transfer Factor needs to be started early and at high enough doses. “It’s a numbers game when you’re dealing with bacteria and viruses,” he says. It is crucial to get high enough numbers of transfer factors into the system to combat the high levels of bacteria or viruses. Recently, Dr. Burlingame had a four-month-old puppy come into to his clinic. The puppy had bloody diarrhea and all the symptoms of parvovirus. In addition to the typical antibiotics, antiemetics, and IV fluids, he gave the puppy 1,400 mgs per day of Transfer Factor (supplement facts). The puppy was home in three days. “I wish I had this a long time ago,” he says. According to Dr. Burlingame, Transfer Factor usually takes about 48 to 72 hours to educate the immune system. He looks for a regression in symptoms, particularly in the case of infections, within the first 48 to 72 hours. He says he will often see an improvement or increase in white blood cell counts in that time frame as well. And, overall, the patient will begin to feel and therefore act better. Excerpt from the the Whole Dog Journal These products have absolutely no toxicity or side effects even at mega doses. You may increase the amounts even further to achieve the desired level of immune efficiency