Children are ethically indisposed to think it’s wrong to eat animals. This article from the Journal of Environmental Psychology published a year ago looks into the schism and cognitive dissonance assuaging mechanisms in play.
This study relied on a small sample size (n=176), between the ages of 4 and 7 years living in a metropolitan area located in the southeastern region of the United States. The sample was otherwise diverse.
As this study was limited in geographic scope (see WIERD on a tangential note), it noted that eating habits vary by culture. For example, eating horse (or dog) meat is not condoned in the United States, but it is acceptable in many other places.
In summary, the childer were shown cards each with a picture of an item, whether a French fry, a horse, a cat, a fish, a tomato, and so on. At the start, they were asked to identify the item represented on the card. Next, they were asked to put the card into one of two bins, each decorated to approximate an animal or vegetation. Finally, they were asked to sort the cards into two areas, one represented by false teeth indicating edible products and a rubbish bin representing inedible items.
The subjects did a fair job of identifying the card items. They had very high image recognition of these particular animals. On the lower end of recognition were hamburger (ground beef patty), almonds, and shrimp. There was a difference between the older children and the younger children, but this may relate to the added acculturation their age would bring.
Without delving deeply into details, in this study, most 6- and 7-year-olds classified chicken, cows, and pigs as not OK to eat. The interesting cognitive trick is that these children also classified these derivative food items as non-animals thus removing the cognitive dissonance. No longer classified as an animal, their ethical framework remained internally coherent.
In discussing the results, many children were ill-informed about the source of various food products. Language games obscured the source. No one should eat a cow, but beef is fine—a hamburger is fine. Hot dogs grow on trees, don’t they?

This reminds me of the story wherein a chicken and a pig are conversing, and the chicken suggests that it and the pig go into the restaurant business. The pig considers the proposition and declines by the rationale that it would be committed but the chicken would only be involved. Children may believe that hot dogs are a by-product like eggs, fur, or feathers—don’t get me started on the down used in pillows, jackets, and comforters—rather than grasping that the animals yield these products at the expense of their lives.
Some people grow up and realise the inconsistency of their ethics and actions, but they find any number of ways to reconcile their actions, noting that the activity is normal and natural.
FULL: DISCLOSURE: For the record, I eat chicken, turkey (on festive holidays in lieu of chicken), and I eat beef (that’s cows, for the uninformed). I also consume some animal byproducts, i.e., chicken eggs and cheese. I also wear leather. I was a vegetarian for about three years until I opted to become a chickenatarian. My life partners goaded me into eating beef, and so I’ve since added that. In all cases, I feel bad for eating defenceless, sentient beings. I’m not sure it serves as any consolation that I limit my consumption to these three animals—or even if it were only one. For the record, I don’t particularly like the taste of turkey or beef, but it’s not offensive like pork, coffee, or alcohol. Chicken, I like. Sorry chickens.
For the record, this is post number 500 on Philosophics. Perhaps I should write a post about it.