"On the farm, we used to give first-calf heifers a high protein supplement to help them deliver healthier calves," he said in a statement to BuzzFeed News. "The supplement was provided by our vet."
Since Liz is a vet, "I assumed that there would be a similar supplement for dogs," Davis said.
"So Jon is drinking a protein-enriched drink formulated for a pregnant dog."
That's why Liz mentions the "healthy" litter Jon would have — because he had just drunk a supplement for pregnant dogs, not dog semen.
"There you have it!" Davis said.