Continuity mistake: When the camera pans in on the two saloon doors at the start of the cartoon, you can see there is a spittoon by the doors marked "Beer." But when the wolf arrives in his car later on, the spittoon is nowhere to be seen.
Continuity mistake: When the wolf arrives at the saloon, he goes to the counter and puts his bag of money on it. In the next shot, the bag has disappeared.
Character mistake: When we see what is happening inside the saloon, there is a sign which reads "Noisy - Is'nt It?" It should read "Isn't."