When Radar goes to give a shot to the lamb, close-ups of the lamb's face shows both of Radar's hands cradling its head. The reverse shot shows him holding the hypodermic in his right hand while petting the lamb with his left.
The Spam lamb shown in the close up shot does not match the one shown in front of Henry.
When Hawkeye first sits down on the edge of Pvt. Chapman's bed to see how Chapman is feeling, it can be seen from the side angle that the bed is not against the post-op wall, and Chapman's head is not raised at all; it lies completely horizontal on the pillow. But in the next shot, looking down at Chapman, the bed is butted up against the wall, and his pillow is propped up a bit against it. Then, the first angle is shown again as Hawkeye stands up and walks away.
Radar is taking care of a skunk and a raccoon. He tells the skunk: "If you were an American animal, you'd be many miles away from here." The skunk is a native American striped skunk. There are no skunks or raccoons in Korea; the closest thing is a stink badger found in Java.
When entering Father Mulcahy's tent and finding that Mulcahy is not there, Maj. Burns remarks to himself, "Good thing I don't need the last rites." But Frank is not Catholic (in Hot Lips and Empty Arms (1973), Frank defends himself from Hawkeye's query if Frank's neighborhood is still restricted by replying rather disgustedly that "There's a Catholic right across the street."). Therefore, as a non-Catholic, Frank would not require last rites.
After Radar asks what's going to happen to the lamb, Hawkeye says he (the cook) is going to make pork chops out of him. In his next line, he reverts to the correct term "lamb chops."
The Greek flag displayed at the end is the current flag of Greece. However, during the Korean War, Greece was a kingdom and had a different flag (a blue field with a central white cross dividing the flag into quarters, with a crown in the center).
Near the end of the episode, when Hawkeye puts the "Spam lamb" on the platter in front of Colonel Blake, who asks him what it is, Alan Alda's shadow can be seen on the right side of the screen saying something, yet his voice is not heard. In the next shot, a close up, Hawkeye says, "A Spam lamb," which is probably what was said by his "shadow" in the preceding shot.
When Radar is talking to one of his animals near the beginning of the episode, an explosion goes off in the distance, compelling him to say, "It's just the war." Just before the sound effect is heard, there can be heard a man (possibly the director) imitating an explosion sound effect. This was probably to cue Gary Burghoff, as the sound effect would have been added during post-production.
Much of "Private Charles Lamb" surrounds Radar's aiding and abetting the escape of the Greek lamb from becoming a feast. However, in "The Longjohn Flap," released about eleven months earlier, Radar is bribed by the camp's cook with a leg of lamb.