There is a full moon. Two nights later, we see another full moon. Two nights later, we see yet another full moon.
During the "Live" news Broadcast, Ted's trailer is seen parked at the crime scene after he brought it to Janet's place.
The male dog is called 'girl' several times.
The revolver fires eight times without reloading.
Thor sustains a head wound in a night fight but there is no sign of the injury the next day.
When Janet shoots the werewolf she fires off nine quick shots from a revolver that only holds six bullets.
On the dates that were apparently a full moon, the moon was new (or nearly so).
In the last few minutes of the film, when Brett jumps off his bike and runs into the house, he can be seen from behind, and it is clearly a stunt person of a similar height with a very bad and inaccurate wig.
Each time we hear the dog growl while seeing his face, there is no visible sign that the dog is actually growling (no teeth showing, no lips raised).
When Thor jumps on the Flopsy, the harness to prevent the dog from getting too close to the actors face is clearly visible. There is a strap around the dog's shoulder as well as his chest. The harness is not visible seconds before or after that shot.
When Thor bites Uncle Ted on the arm after fighting him in werewolf form the previous night, the safety padding under Uncle Ted's sleeve is very noticeable.
When Brett is pulling on the lock on the pound fence, someone dressed in black is visible over his shoulder behind the fence.
It is never explained how Ted is able to uncuff himself in the mornings.
Uncle Ted tells his sister that he wants to keep a low profile during his first night there, obviously so he can go into the woods to handcuff himself to a tree. However, if he wanted to keep himself from hurting anyone when he transforms at night, why did he wait until it was completely dark outside to run into the woods?
In _Werewolf of London (1935)_ the transformations are not caused by only a full moon as Ted suggests.