In 1983, the population was - what - 4 billion? 100 pounds each, that's 400 billion pounds of grade A monkey meat. On life support so it won't spoil since the meat had to remain in living condition (the 85 show would throw out the continuity when demonstrating a new food processor machine.) Depending on how big their digestive systems are and frequency of need to eat, and on size of their planet and number of Visitors, that could potentially pose a situation, absolutely.
Considering how few habitable planets there are, and how the Visitors were also colonizing at the same time as kidnapping would it be any different if humans went across the galaxy, found a planet teeming with life, but then found one species actually had cognizant and sentient ability? Would humans care? Flip a coin, it would be easy to hypothesize situations where humans would or where humans would not. I'd wager on "would", however.
Both miniseries could only say so much, much less the 85 weekly show. Assuming the latter's writers had thought of exploring these avenues along with keeping the cat/mouse trope going. Plus, viewers don't like facts and some even loathe it when shows aim for historical accuracy (some of the doctor who forums online are hilarious in people saying they don't want it to be accurate or think those who do are wrong) and this is a show that was originally intended to be educational due to its using time travel to visit the past)

the human body is more than 60% water.

I remember Martin saying that:

1. They wanted ALL the water
2. Humans were for food but not all. Some were to be trained as soliders. They ate other creatures such as rodents, insects, birds, & even spiders.
   By the time they'd finished Earth would be barren & like a desert.